Spoiler (highlight to view)
Harem: Well, basically Himari, Shizuku and Rinko all like Yuuto. If more than 3 females have romantic relationship with a male it is Harem.
Romance: It follows from Harem directly.
Ecchi: Readers get to see Himari's boobs from chapter 1 and you don't call that Ecchi?
Romance: It follows from Harem directly.
Ecchi: Readers get to see Himari's boobs from chapter 1 and you don't call that Ecchi?
If nobody rebuts my point, yet the Genre is still changed for no reason, then I will ask for a lock to he Genre, I guess.