"...constantly exchanging mucous membranes..." means they've been constantly making out (just kissing) since forever that they came to have identical body constitution so it made it possible for them to become fated pair with one omega lol. Yaoi logic ٩(๑❛ᴗ❛๑)۶
Oh okay I thought it meant they had sex and thought it sounded strange, but if it's only kissing that makes sense!
tbh i think they had sex...on the author pixiv you can see this https://www.pixiv.net/en/artworks/76545901
someone posted it here a few comments back
i cant say if it's official tho
It's official on Cmoa (a official Japanese site that has the 2 volumes & single chapters versions) includes it on their site, so kou & ginga official had sex before the main story
https://www.cmoa.jp/title/152580/ (there listed on the 2nd page) on the volume version it says vol.2 has it but can only be read digital so I guess the actual physical copies don't have it
somebody have to translate this
Same but I need add, idk know if those 2 Extras are in Volume 2 digitally or not but there definitely on the single chapter version just incase someone plans buy the book/volume version
Somebody explain to me why they reacted like that to the doctor....