FNS-149 Yayoi Hamabe: childhood friend learns sex on a hometown trip

Yayoi Hamabe runs into an old playmate while back in her hometown for a visit. She has grown up into a woman, and her loose top leaves her breasts exposed enough that he reaches out and touches them. That starts a summer of sex, where he teaches her about orgasms, and she takes to it fast, wanting it daily before he heads back to Tokyo.