Sousobo no Himago Fudeoroshi ~Hiibaachan, Motto Shitai yo~

It's the end of the year. It's been two years since I last visited my great-grandmother. Since it's been so long, I decided to take a bath with her, but... (Here we go again...) This is what's been bothering me. Whenever I see a naked woman, or when a woman clings to me, that embarrassing thing between my legs gets bigger. "Kaoru, come in. I'll wash your back." "Huh...? N-no, it's okay... I can do it by myself..." That's the official reason. The real reason is my crotch. For some reason, I'm embarrassed about the growing thing between my legs. I feel like I shouldn't let great-grandmother see this. ...But I can't hide it, and she finds out. When my great-grandmother saw it, her elegant beauty beamed with a smile. "It's painful to leave it like that, right? Great-grandmother will heal you." And then, she placed her hand on my crotch...