Somewhere in everyday life that repeats every day, there is an entrance to a mysterious world, this is the story of the beginning of the "Y". One day, a transfer student comes to the class of Jinpei Jiba. His name is Sandayuu Koma. The two of them immediately hit it off in the wake of their favorite anime story. Jinpei, who is completely open, consults with Koma-kun about his troubles of love. He says that he is for some reason in love with a high school girl who he meets on the train. Jinpei decides to ask Koma-kun to help and confess to her. After school the next day, they followed her to talk to her, but they noticed that some suspicious man was following her...

Matarou Tamada, who entered Y-Gakuen and became a junior high school student, met Jinpei and others belonging to the "YSP Club" and had a fun life. However, one day, a huge salary man suddenly appeared in the school! He is a huge salary man, Miyazawa-san, who has been certified as a school seven wonders, metamorphosis peeping at the women's changing room with a huge face...There seems to be a rumor, too. Jinpei and others are trying to start a mysterious elucidation mission, but Fubuki Himekawa's classmate Akane was looking out for it from outside the club room.

Himekawa Fubuki is a red point of the "YSP Club". As Madonna of the club, she has a nice morning today, but she stepped on dog's poop at the entrance of the dormitory. When she thought about it, Fubuki wakes up in bed. "Was that a dream!" she is relieved, but she repeats the same experience as her previous dream. "Was it a preconceived dream?" Fubuki thought, this time, although she avoided the poop, hit Matarou who forgot something, and stepped on another pile of poop. Then, the next morning, she wakes up in bed again. If you step on the poop, you will return to the same morning. Is Fubuki destined to continue to step on the poop as it is?

Ace Sakata Hayato of the usual gentleman soccer club suddenly started playing. Humble Ayumu, who became the youngest professional player in history, was asked in the interview about "good attacking method" and "crushing (man's) money!". And was pulled around by doing messy action. Obviously strange something like that was very strange. Matarou suspects that it's because of "Guess Note", one of the seven wonders of the school. It seems that the person whose name is written in The Guess Note will act like a "Mess". If that's the case, it's time for the YSP Club. Jinpei and his colleagues decided to go to the library where Guess Note was said to have appeared first.

For the daughter of the head of the school, Emma Daiouji, Jinpei and others who will get one of the seven wonders of the school, "Chocolate for predicting the future", known as "Fortune Bitter Black". It is taken by the senior Ryuusuke Kyuubi who "had reserved" though it lined up in the large procession which continues from the "Chocolate Factory" of Cha Li in the school, and he got Fortune Bitter Black at last. When Kyuubi tasted one, he said, "Thou shalt, the fruit of the beautiful peaches! The cheek is stroshed by the wind and it is Chin! There is a paper called. Then suddenly Kyuubi floated, and he had been flown somewhere with tremendous force.

One day, Matarou visited George, the director of the film club he met by chance, and when Jinpei and others came to the film department, the club room was somewhat hectic. Apparently, a strange zombie was seen in the image taken in the forest. Looking at the zombie, Ryukana-no-su recalls one of the seven wonders of the school, "The Reflected Tomomichi-kun.". There was a rumor that the movie that Tomomichi-kun appeared in would be cursed, and the situation that the leading actor quits one after another in this movie started to happen. Then, Matarou is suddenly selected as the leading role, and the filming continues, but Tomomichi-kun appears there.

Jinpei who has solved the seven wonders of the school one after another, the last one is Hanako-san of the toilet. Immediately, when he was checking the location, the scream of Matarou who went to the toilet alone echoed! When Jinpei and the others rushed to the women's toilet, Matarou was sucked in by a tornado that came out of the toilet bowl. Jinpei and his colleagues, who thought it was Hanako-san's work, followed the road leading to the old school building where Hanako-san was there. Then a big gate appeared and they heard a voice saying, "Welcome to Morasita La Damelia."

Jinpei's YSP Club ranked first in the club's approval rating due to recent success! The student council president, Kirigakure, is interested to know how Jinpei and others are turning into heroes and repelling the spirits, while thinking it was an eyesore. At that time, Jinpei and his colleagues were trying to challenge Y Circle, one of the largest mysteries of Y Gakuen. It is a mysterious building that suddenly appeared during the construction of the school. It seems that it was too heavy to tear it down and it was not able to be broken. Ranto, who has been investigating Y-Circle for more than a year, learns about Jinpei's movements and follows him. What is the purpose behind Ranto?

Jinpei, Sandayuu and Matarou scored red in the mid-term test. Three people will be put in the re-education facility "Akatentraz Camp" which is said to be impossible to escape! According to Toru Tamachi, whom they met in the camp, the very strict Spartan teachers have recently come and all the students don't come back from supplementary lessons. It was Jinpei who was made to take the supplementary lesson at once, but the essential supplementary lesson was training to train all the body for some reason. The three people who had distrust planned the escape together with the senior Kuruse Ikuto, who had been planning to escape, but it seems to be tricky.

Nina Tokuda, editor of the Y-Times editorial department, came to the YSP Club for advice about the mysterious figure "Transparent Yankee Kurosawa" who works wildly on the campus grounds. Then, Sandayuu discovers Mera lining up at a popular tapioca store with a girl in the photograph showing the truck that the transparent Yankee rolled over. No way, her? He goes to the site immediately, but Mera leaves the place with the ghost of the child in a big hurry, and Kazuma Shishiguro. Perhaps the incident was the work of Kazuma. However, he can't believe that Mera and others will do bad things, Jinpei decided to go and listen. Then, Mera begins to talk about the encounter with Kazuma.

Repair of the giant robot "Super School Coalescing, Gakkouger Y" which was damaged by the meteor uproar, is finally completed. The school president will leave the test operation to the five members of the YSP Club. Gakkouger Y is the school's most important secret, and it will start at 5 o'clock in the early morning to conduct test operation in secret. Tetsu Kiyota, the director of the giant Robo Research Club, who had been eavesdropping on such a secret story, appealed for love for Gakkouger Y and asked the head of the school to give up his pilot's seat, but he was turned down. On the morning of the day of the test operation, he could't give up.

Knowing that the Future Science Club has developed a powered suit "PD700R Custom", the YSP club members, including the mecha-loving Fubuki, decided to go to see it immediately! The manager, Awado Tatsuhito was supposed to do the trial run, but suddenly the powered suit begins to move without permission! Moreover, the autopilot program ran wild, broke the wall of the club room and jumped out! In order to stop the runaway, Tatsuhito tries to destroy the PD700R custom, but Fubuki says, "This child is not guilty! And, she runs away with the suit. Jinpei and his friends chase after Fubuki in another powered suit that was in the club room.

Fearing that his daughter Emma will found out, the school principal throws away his idol photo book. However, no matter how far he throws it away, it'll come back to his hand for some reason. The biggest pinch in the history of Kinya Daiouji. The troubled school principal consults with the boys of the YSP club and has them throw it away in various places, but the photo book still comes back. Troubled, Jinpei and his colleagues try to throw it away at the "Absolute Incinerator Godhole YGH99", which is at the top of the Incinerator Mountain, where anything is absolutely extinguished. The mission to test the bond between men and it begins now.