Faithful Dog(2021)

Chuuken-kun

Akira, a sensitive high school boy who struggles with socializing, admires Nao, an older café employee. He respects Nao as his mentor and follows him around like a faithful dog out of sheer hope of getting closer. As they spend their days eating, traveling, and chatting, Akira's feelings gradually develop into romantic love, but... This is an everyday love story which portrays step-by-step feelings of a loyal but clumsy school boy and a guy with maxed-out social skills.

(Source: Renta!)