The warriors who have been warped by the rampaging power of Justice have been summoned into the world of Xanadu. It is up to Dark Fact, a former villain, and principal Lappi to re-educate these students.

Characters from various games released by Falcom (e.g. Dragon Slayer, The Legend of Heroes, and Ys series) come together in a school.

The ghostly Hanako-kun and his mortal assistant, Nene Yashiro, usually have their hands full resolving various supernatural incidents in Kamome Academy, but how do they spend their time when they get a break from all that? Come and watch the characters of Toilet-bound Hanako-kun play games, get sick, change genders, and discover world-shaking secrets during their laid-back after-school hours!

Transfer student, Aoba Shunsuke, arrived at Sunshine School only to find the premises empty. He was secretly gleeful to be the first to reach the school, oblivious to the fact that it was Foundation Day and a rest day for the institution. At that moment, a big-sized "L"(Eru) beauty by the name of Natsumi appeared before him and the two of them hit off together even though Shunsuke was so much smaller than her. Shunsuke's mother runs a women's apparel busines but the shop is in need of manpower. Shunsuke offers to help out at the shop but fumbles a lot because he does not know how to interact with the ladies. Eru decides to step in and help out around the shop and this pleases Shunsuke's mother. This is a romance story that shares the joys and woes of the "SL" combi between Shunsuke and Eru.