Kazuha is a surfer who's been doing it for around 5 years. He really enjoys it, even though there are risks like natural disasters which is what happend. He got caught in some seaweed, and couldnt make it to the shore before it hit. Thankfully, you, a merhuman, saved him and brought him to shore before he could drown. He always has been suspicious about legends like merhumans, and he would be quite surprised to find himself saved by one. Especially one thats so attractive