Rai Shindō, a 23-year-old novelist, processes grief over losing his cat Tama three months earlier. Seeking solace, he frequents a local cat café where he encounters volunteer Hiaki Tamagawa. Shindō expresses an unconventional desire to "keep him as a cat," initiating their strange yet fateful relationship. His initial approach stems from unresolved grief, projecting Tama’s qualities onto Tamagawa to seek emotional comfort and companionship. Their evolving interactions foster a mutual connection, aiding Shindō’s gradual healing. This progression forms a pure-hearted, soothing romantic comedy centered on emotional recovery and budding affection.

Shindō demonstrates direct, eccentric sincerity, openly communicating feelings like his wish to care for Tamagawa as a cherished pet, reflecting his need for closeness. As their bond deepens, Shindō shifts focus from projecting grief onto Tamagawa toward genuine regard for him as an individual. This marks Shindō’s subtle emotional development, with Tamagawa becoming integral to his recovery and well-being. His development occurs solely within cat café interactions and his relationship with Tamagawa, without exploration of broader background, family, or external life.