Naisho de Alleluya

Shuuichiro is a famous song-writer and a father to Botan from a failed marriage. Botan is lonely and asks if he can have a cat. Shuuichiro tells him no, but Botan brings one home anyway... a very human-looking cat who is actually a man who Shuuichiro slept with before named Umekichi! Will Umekichi get to stay? Will Shuuichiro figure out what...