Among all the spinoffs and side stories that surround the Aoba Q Madou futanari world lore, it's nice to come back after 4 years to this central story. As always the Joint Futanari Practice series is focusing on exhibitionism with some hot action in a transparent bathtub. It's so cute watching the shy futa girls jerk off while watching these childhood friends passionately humping eachother. Rin still feels a little weird about doing it with other girls watching but at this point she's well experienced in it. Glad the thrill hasn't died off for her. Many more exhibitionist stories hopefully await us in the future.

If you found this work randomly and not familiar with previous works from this author I'll just say even tho this is the 6th part in a series you could just randomly read this on its own and you won't be missing much in terms of context. It works well as a standalone.