Love Sick (2014)

Original title: รักวุ่น วัยรุ่นแสบ

Punn has a girlfriend, but his father wants him to date his friend's daughter. Punn's little sister, Pang, is obsessed with boys' love. Punn's father doesn't listen to Punn well but adores his little sister Pang. So Punn needs to convince Pang that he has a boyfriend so that she can help talk their father out of the idea of dating his friend's daughter. Noh is in need of a higher school budget for his school club, or he will be in huge trouble. Punn knowing he is able to help Noh out with his problem, decides to ask Noh to become his fake boyfriend in exchange for helping Noh raise funds for his Music Club. However, the two 17-year-old high school boys eventually fall in love after the deal brings them closer together.