Uesugi Fuutarou, a second-year high school student living a poor life, receives an offer for a part-time job as a private tutor with favorable conditions. However, the students he is supposed to be teaching are his classmates!! And they are quintuplets!! All of them are beautiful girls, but they are problem children who are on the verge of failing and hate studying! Can Fuutarou guide these extremely unique girls to graduation?!Fuutarou is hired as a part-time private tutor to guide quintuplets who are on the verge of failing and hate studying to graduation. During the school trip to Kyoto, their relationship almost becomes strained over Fuutarou, but after a rain shower, they are able to reconcile and have a fun-filled end to the school trip. Meanwhile, it is revealed that it was Yotsuba who Fuutarou met on the school trip six years ago... The quintuplets' past stories are revealed!!

Kuroto Hinata is searching for his sister, who "once existed" but is now forgotten by everyone around him. He receives a letter from the beautiful transfer student, Shirai Shizuku, stating, "If you want to know about the whereabouts of your sister, come to the library after school." When Kuroto goes to the library, he finds Shirai inexplicably half-naked and waiting for him

Kuroto Hinata is searching for his sister, who "once existed" but is now forgotten by everyone around him. He receives a letter from the beautiful transfer student, Shirai Shizuku, stating, "If you want to know about the whereabouts of your sister, come to the library after school." When Kuroto goes to the library, he finds Shirai inexplicably half-naked and waiting for him

Deep in the tunnels of an abandoned mine lurks a demon that absorbs the power of anything it touches: the Black Ooze. When it consumes its first human male, it acquires both intelligence and ravenous sexual desire, much to the distress of a sorceress who mistakenly enters its domain. The heroes who seek glory and riches in these caverns are about to learn why monsters should be feared!

Deep in the tunnels of an abandoned mine lurks a demon that absorbs the power of anything it touches: the Black Ooze. When it consumes its first human male, it acquires both intelligence and ravenous sexual desire, much to the distress of a sorceress who mistakenly enters its domain. The heroes who seek glory and riches in these caverns are about to learn why monsters should be feared!