Ayumu Chiba's stunning appearance is overshadowed by his frequent tearful outbursts and his singular kitty companion, Ai-chan. After Ai-chan's passing, Ayumu meets Haruki Imano, a feline devotee who takes him under his wing. Despite developing an attraction to Haruki, Ayumu's emotions are complicated by the arrival of Hiro, Haruki's nephew, who competes for Haruki's affection.