[Soda Batake (Muteki Soda)] Cool Onee-san has a problem that I can't tell anyone [Yahaarr]

A cool beauty with a ponytail and a heavy bust carries an embarrassing secret she can't tell anyone, and it falls to a young boy to help her with it — swimsuit peeled down under the bright light, both of them trying to leave emotions out of it. The clinical arrangement collapses the instant her body betrays her, squirting hard enough to leave the poor kid stammering apologies while she pants on the bed. Rather than call it off, the onee-san takes charge, letting him suckle at her breasts and coaching his inexperienced hips — 'if you want to make a girl feel good, you have to move them a lot harder' — as he vows to prove himself a man even if Kasumi and the other girls never saw him as one.