Convenience Store Kyodai S01 E04 Episode 4

Convenience-store sceptic Takiji Otsuka meets Hikaru Minamikata, an elementary school boy who always eats alone at Tenderness. When Hikaru is teased about his dad not coming to sports day, Takiji declares he'll run in the three-legged race as his grandpa. As they begin training, Junko falls ill. Takiji panics, but with help from Mitsuhiko and Hikaru, her health and their marriage recover.