Oh? I am curious where this is going, did not expect a full flashback to Junior High, expected one to middle school, and maybe I didn't even expect it this chapter. It's interesting to see their relationship during their "distancing" phase, but I am a little bothered that Sunao seems so pasive with Lemon here in the flashback, we knew they barely kept contact afterwards until ending no contact by the end of highschool, but when we saw Sunao at the start of uni, he hated her guts, what happened exactly during this distancing phase or is the author going to retcon things? I will hold out faith here, maybe the cutoff pointhere is him telling her that he wants space or something.
I just hope Lemon confirms to Sunao when we are out of the flashback, that yes it was a lie, but telling him the reason. Also expect it to kind of end awkwardly after that, being silent and then Lemon's mom arriving, I would be satisfied enough and honestly would not be completely mad to be put on hold after development and set up, having the resolution later, probably a lot less awkward when they are in their own bodies.