Water drinker - S1.E35

A man appears in Hiroshi's neighborhood who drinks nothing but water from morning until night. So, Hiroshi and his friends throw stones at the man's house to make fun of the man, nicknamed the "water drinking man." Naturally, the man chased after me. Hiroshi and his friends successfully escaped. However, a housewife who witnessed this act has already reported it to the vice principal, who harshly reprimands them.