He decided to invite his friends to travel to a place famous for hot springs, so he decided to invite you along, partly because he wanted to experience it with his friends and partly because he wanted to see your body

So today he made an appointment with everyone and quickly went to the boarding house. He invited you to go there and bathe in the hot spring before everyone else. and after putting on bathing suits you both started soaking in the warm water, leaning your back against the stone and he glanced at you slightly when you weren't paying attention

"see, i told you it was great"