Sankaku Heart (1995)

Sankaku Heart 1995 / さんかくはぁと 1995 / Three Cornered Heart , Sankaku Haato

Tomo is a shy young man, pathologically nervous in the company of young women, who can trace this condition back to the childhood bullying he received at the hands of his cousin Ikuko. But when his parents go abroad for along trip, the fearful Tomo is forced to move in with his relatives, only to discover that the horrible Ikuko has grown into a beautiful young woman. (Source: wiki.d-addicts)