Duang Fai Nai Pa Yu

Natee grew up in a tough household. his mother especially expected a lot from him. He was always picked on at university. The only person that was nice to him was Fah, a student in the faculty of social works. He developed feelings for her. She too liked him a lot, but there was another guy that liked her. Natee was under a lot of pressure and one night someone offered him some drugs and he tried it. He was hooked from then on. (Source: AsianFuse Wiki)