Kimi no Neko ni Naritai

College orientation. A boy more beautiful than he has ever seen before, Sunakawa, has Murata falling in love at first sight. Living his everyday life as a straight man without giving it second thought turns on its head, with his sudden confession ending tragically in rejection. Undeterred, he sets his heart on becoming the "bottom" to his "top," always doing his best and looking for opportunities to get closer day after day. Despite turning pale with anger and astonishment at Murata's advances, before long Sunakawa becomes unable to ignore him... A good looking top and average looking straight guy—an anything-goes (?) battle of love begins?!

(Source: Gentosha Comics, translated)