Hello, my name is Cao Shurui, and I am a summoner. A... summoner who can use hero abilities. This book is actually a typical system-based leveling-up story, not exactly a wish-fulfillment novel, but it's fairly standard. Already appeared in: Lord of Magic Bullets and War Maidens, Black Bullet, Chivalry of a Failed Knight, Is It Wrong to Try to Pick Up Girls in a Dungeon?, Campione (before anime time), Blade Dance of the Elemental Master, Campione (anime time), DXD (Part 1), FGO North American Singularity, Strike the Blood, Overlord, DXD (Part 2) + Ending.

Lin Ye travels back in time to the start of his second year at Sobu High School, two years before the apocalypse. He decides to change the course of the apocalypse and save the world. As the apocalypse unfolds, the relationships between the girls around him become increasingly complicated. Shiyu: "Tell me, are you still in love with your first love." Yukino: "Tell me the truth, did anything happen with my sister?" Haruno: "Just once, let me be willful for once, after that, you should be with Yukino." Isshiki: "Senior, senior, I have been bought by you now, you have to be responsible!" Kato: "Lin Jun, I seem to know a lot of your secrets, and the pressure is a bit too much. Let me lean on you!"... Lonely Doomsday Helper Kasumigaoka Shiyu Crystal Mutation Helper Yukinoshita Yukino Alien Invasion Helper Yukinoshita Haruno Interstellar Wandering Helper Touma and Setsuna Dark Biochemical Helper Eriri Catastrophic Doomsday Codenames [Resurrection of the Dead] [Honkai Beasts] [Iron Blood Machine Tide] [Deep Blue Sea] [Originium Disaster] - PS: This work involves "Oregairu", "Passerby", "White Album", "Bunny Girl Senpai" and other works.