Welcome to the paradise of crossovers, Uehara Tetsuya. A hardcore anime otaku, he thought transmigrating to a world full of anime characters would be the peak of his life. Until he discovered this paradise was nothing more than a terrifying waystation. Every so often, he is thrown into one bizarre, rule-bound horror world after another, struggling to survive amid bloodshed and madness. Confessions rejected? Cutting remarks? He doesn't care. After all, he has another dungeon to enter tonight. Who has time for romance? But he never expected that, when he returned to everyday life with a sigh of relief, he would discover it was only the beginning. The corridor whispering deep in the old school building. The bloody words writing themselves in a classroom at midnight. The eerie smile in the mirror... And Uehara Tetsuya gradually assembles a very unusual team! The popular queen Yumiko Miura, genius writer Shizuka Kasumigaoka, perfectionist Yukino Yukinoshita... This mismatched crew will delve into one bizarre, rule-bound horror dungeon after another! Uehara Tetsuya's answer never changes: survive! (You can start reading from Chapter 19. The earlier chapters are really bad.)