To be honest, I don't have high hopes for Yakumo x Yamato-kun ship.
This feels like one of those manga where it will only give you the feels.
I'm quite happy though coz' the story is so fluffy and cute but
I will hold my feelings for now when it's so obvious they don't have
any romantic development at all (for now.. I hope so...)
just a nice onee-chan x ototo relationship.
I don't want to feel betrayed by expecting so much..
But I hope I'm wrong. Lol. I'm so cunning.