Mukahi-kun wa Koukousei

Mukahi-kun wa Koukousei summary: Aoi, landlord of a share house and a florist, can\'t keep his mind off his first love, Mukahi. One day, the two bump into each other at a wedding. They realize that they are still in love with one another, and spend a blissful night full of passion. However, Mukahi comes to live at Aoi\'s share house, and there\'s no doubt about it... Mukahi is a high school senior?! From MangaPlaza