A unique mature Japanese drama

You must watch it for unique experience because:-
1. The male lead is an expert in capturing female panty.
2. Extreme love b/w leads
3. suspense till the end

The story of a teenage boy called Yu, who falls for Yoko, a girl he runs into while working as an `up-skirt' photographer in an offshoot of the porn industry. His attempts to woo her are complicated by a spot of cross-dressing - which convinces Yoko that she is lesbian - dalliances with kung-fu and crime, and a constant struggle with the guilt that's a legacy of his Catholic upbringing.