From MangaHelpers: Meguri Daiki found Ichigo, a doll sized cute girl devil, when he was still in high school. Now going to college and living on his own, he treats Ichigo as a pet/roommate and takes care of her needs, namely snacks and video games. Although Ichigo can’t talk, she seems to understand Daiki. He brings Tsuruoka Nei, a schoolmate from high school and now college, and gets intimate with her. But Daiki soon finds out that he isn’t the only one with a tiny devil as a companion.

From FairGame: Moroto Akira is a college student that never had a girlfriend in his life. Every Friday, he confessed to a girl but all he got is rejection, and now it's became 10 in a row. To Akira, suddenly a girl who was his lover in his past life and promised to meet again in next life has appeared. More so ever, it wasn't just one but several of them appeared front of him.