While realizing his feelings for his cousin, whom he had been caring for in place of his parents, Yūji experienced heartbreak. This was noticed by his senior at university, Makki, and to keep it a secret, Yūji began “keeping” his senior at home. Makki was like a real cat, free-spirited and unrestrained. As they lived together, things gradually...!? A spoiled beautiful cat × a heartbroken man, an unexpected cohabitation life ♥