Yume no Kodomo

Youji Takashima is a high schooler that lives with his beloved older sister. One day she tells him she's leaving to work New York and leaves him with her friend, Ren Akishima, whom Yohji dislikes. Things aren't easy at first, but slowly their relationship grows closer. Yohji realizes he's fallen in love, but Ren has demons from his past to overcome.... but maybe Yohji is just the cure he needs.