This manga is great. I particularly love it when gay guys play supporting roles for lesbians and vice versa, I wish we had a tag for it. The hints that the uncle was gay were pretty good, my favorite was the flashback to when he took Sumika to work and his coworker goes "she's so cute, is she your daughter?" And he replies "... Is that a serious question?" And they go "guess not, haha!"
Also both main characters were very well realized by the author and it really took me by surprise to read this thread and see all the vitriol for Ito. Gay romance dramas have psychological elements like these more often than not and yet somehow this one was different for people? Idgi.