When Daiki comes home from work, he finds a beautiful girl sitting in front of his apartment! For some reason, she knows Daiki's name; It turns out, that she was his neighbor during her childhood, and her name is Haru. This girl, whom he has not seen in 10 years, has come all the way here to ask him — with tears in her eyes just like old times — to let her stay in his apartment until she's done job-hunting. This time however, the Haru who suddenly barged into his bath, now has a body that's become very different from their old days: a sexy dynamite body with massive tits☆! Drawn by lovey-dovey vanilla rookie Kouichi Arima-sensei, this is a story of living under one roof with that girl next door from childhood, who's now all grown up into a fine young woman. (Source: DMM, translated)