Responses

It's possible to have multiple orgasms but it's not necessary for semen to come out every single time. Dry orgasms happen. Plus the duration of each scene, like 1) body licking and butt rimming 2) fingering 3) the main event, we don't know how long each part took but I think they were long enough to get Yashiro's up and running again, possible to spew semen out.
wait a sec...did Yashiro come ? http://www.mangago.zone/read-manga/saezuru_tori_wa_habatakanai/mf/6ba770cf8927a77ff194ed50229a1153_chapter-10/pg-7/
I can't believe I never noticed until now I just thought he was feeling good lmao