Kowamochi-Kun Is Crazy About Cats summary:

Yuno Shiraishi was worried about her relationship with her senior who goes to the same university. He doesn't wear condom when they are having sex. She tried to talk about it with him at a pub, but he said: "Then, do you want to break up?". At that moment, a tough-looking handsome waiter who was watching the whole story throws beer on him, and the two of them are kicked out of the pub... Yuno, who is at loss, meet a white cat when she goes to a shrine. "If you want to get out of your situation, what about becoming a cat?" Yuno, who has turned into a cat crying in surprise, appears in front of the pub waiter (Takashi). She was afraid that he might be a scary person, but he clumsily gently picks up Yuno (the cat) and takes her home...