Why is Mana such a bitch?
Confirmed for worst imouto.
It looks like blood relation isn't everything after all.
Really? She seems alright to me. Seems like she wanted Shidou to not be wishy washy and to take responsibility for all the girls he seduced. If anything she seems like a perfectly supportive imouto.
OP is probably referring to Shidou probably about to get his dick cut off. But really, it's comedy and Mana was just saying things, her mind was spinning and not thinking clearly
She got angry because she thought he was going against traditional family values and eight-timing, she had no reason to believe that he was treating any of the girls badly other than juggling eight of them at once.