Fic 1: Keitaro had a demon sealed into him whose purpose is to impregnate women. It still tries to fulfill its purpose despite the seal, and for some reason, is grandma thinks he sould run the Hinata Dorm.
Fic 2: Kanako sacrificed herself to save Keitaro when they were little, and asked him to forget his promise to the promise girl and get into Tokyo U for her instead. Years later, Keitaro is a Tokyo U student well on his way to get a degree in archeology, when his grandmother gives him a call.
Sorry I don't know the titles, but if I knew those, I'd have found them myself...
Fic 2: Kanako sacrificed herself to save Keitaro when they were little, and asked him to forget his promise to the promise girl and get into Tokyo U for her instead. Years later, Keitaro is a Tokyo U student well on his way to get a degree in archeology, when his grandmother gives him a call.
Sorry I don't know the titles, but if I knew those, I'd have found them myself...