Part of a series:
1) Uso Mitai na Hanashi Desu Ga
2) Erohon Bukkake (various oneshots one from Uso Mitai na Hanashi Desu Ga)
14. Uso Mitai na Hanashi desu ga H (嘘みたいな話ですがH) by Koshino
Side story of Uso Mitai na Hanashi Desu ga.
https://www.mangaupdates.com/series.html?id=132618
http://www.mangago.me/read-manga/uso_mitai_na_hanashi_desu_ga_h/
Uso Mitai Na Hanashi Desu Ga