Responses
Idk. The line can be really blurry sometimes. Yaoi is a lot harder to tell than with hentai because hentai is ONLY hardcore stuff, whereas yaoi is just sexual content, but the point at which it is considered as such can be very hard to tell at times.
So, not super explicit, but does this take it beyond qualifying as just shounen ai? http://www.mangago.zone/read-manga/aitsu_no_daihonmei/mf/mi_chapter-23/pg-9/