I would say I'm not satisfied with this ending, but honestly they did everything they should so why overstay their visits? Honestly pleased and I'm glad this ends this way.
the version you said is on mangadex as well... but honestly it only provided the reason of why she look like that on this SFW version, literally not required if you're purely seeking the story from the protag's pov.
Hey, really really thank you SO MUCH for picking Bakuon man! Are you planning to do the rest of the manga? Honestly there are a lot to catch up and I hope you can do it all even eventually.