Goodbye Mermaid Princess: Wet for You

Miumi Fukaya has a crush on her deliveryman, Junta Togawa. One day, when she collapses, Junta comes to the rescue like a knight in shining armor. That's when she knows that he's the one. She tries to make him fall for her, but she's awkward and it's hard to tell what he's really thinking. On a rainy day, Junta finds an excuse to come visit Miumi. Overjoyed, she takes him in, and in an instant his kind charm gives way to his masculine appeal as he tells her the dangers of letting a strange man into her apartment. Then, he takes her in his strong, masculine arms and gives her a forceful kiss. It's her dream come true, but she finds herself remembering a frightening prophesy received in her youth. "If you don't find true love, you will dissolve into sea-foam..."

(Source: Renta!)