I flipping hate false harem. But here I can see that its the lil sister's blessing to be in a relationship with Tomoki even with an ugly starting point. Compared to the childhood friend friend who is still taking her time being shy shy when the one shes interested in is being hit on.
True! Like why should they have to to prove their relationship? Plus, they've been dating maybe a week, so even if they weren't faking it, they might not be comfortable doing it anyways.
"Oh so you say you've been dating for 2 days, huh? I don't buy it. Why don't you prove it to me by having sex in the hallway right now?"