This was definitely a different manga.
Overall its a interesting story, the whole "I screwed my "kid"" thing kinda weirder me a bit at the end, but I guess Yuuta only became their "kid" once Yoki (the main personality) decided so, which was after Yoki comes back, just a bit weird how the author keeps making Yuuta state that he only wants to be screwed by Tomohisa, I guess its for the laughs in the extra, but now that Yuuta is astablished as their son, its weird for both Yuuta or Tomohisa to still see each other like that, but the ending itself made sense and thats what matters, didnt expect them to go the DP route and drop the cliche amnesia trope.
7/10 - Needs more wholesome Yuuta and less lewding Yuuta.