I rmb seeing some spoiler comments that the yellow hair is indeed the stalker and the little sis and little bro are not the only ones that went back in time.
Thinking back I've been following Namaikizakari since i was like back in middle school, seeing the progress now made me feel like they are actually processing in real time and the good thing is that there really is progession and it is a sweet one at that, its really great (^ω^)
Am i missing out on smtg? When did the two of them have sex? Y did the grey or black hair (sorry forgot their names) said smtg like when they were doing from behind he couldn't really see the face and about totally his type?
Is it just me or is the chapter really so very short??(⊙_☉)