About a year after Ai and Chen Nhai start dating, Chen Nhai feels that Ai has changed. Ai starts acting suspiciously which leads to a dispute between the two. Chen Nhai starts to worry about the future of their relationship, so he searches for Ai to appease him.

Ai, expelled from school, returns to Thailand and meets classmate Chen Nhai, a Harley rider obsessed with a yellow duck keychain. They fall in love, sparking a whirlwind romance.