This going in the wrong direction!!

After watching Anime I thought "Okay , It's pretty mature approach by both of them . I like this show , they both are working really good and close siblings unlike some lovebirds " But after reading volume 5 , 6 and 7 . I realised that I had made a Mistake, "They already kissed two times ". This is crazy. This seris is really shaping like "Domestic Girlfriend" 💀💀 IF YOU KNOW YOU KNOW .

EDIT 1 --- Well well well I am overreacting on this .