The pinoy series deals with gay boys in a catholic school and during a church organized camping trip. It is a lot lighter than Original Sin, with a lot of comic relief characters.
While I was watching this japanese drama I was constantly reminded of SITR. Why? It is a noona romance. The woman (who behaves like a doormat) works in the office and is a victim of ordinary office harassment. Meeting a fake rebel, gives her the courage to fight back. There is even a mother looking unkindly on this relationship. This drama is less angsty and much sweeter than SITR but the korean drama has the best chemistry ever!