I Fell in Love with My Sister's Boyfriend
Complete | Ni SanSui, Moriya | 2000 released
Zinan dresses up as girl and goes on a one night stand with a guy to verify his sexuality. The next morning, Zinan leaves without giving his name or nummber, but the misses Zinan. That guy uses Zinan's sister to get back in contact with him.
The Voice Next Door