Nakaimo - My Sister is Among Them!
Naikamo - My Sister is Among Them! is an anime series based on the light novel of the same name by Hajime Taguchi, about a boy named Shougo Mikadono who is transferred to an all-girls school named Miryuin Private Academy in search of a bride. The anime series lasted from July to late September 2012, while the light novel lasted for three years from 2010. The manga, published a year later, continues publication.
My Blooming Sisters (S01E10)
Mana stuffs herself at the Mikadono group party, which is made clear when she leaves.