maybe mana can live when alice (playmate), makoto (beloved), aguri (mistress)or regina (sexfriend) betray her with someone else and leave her harem but rikka is her wife and she will not allow this to happen.
I... I wanted to draw Mana's attention... cause... cause... lately you won't hang out with me anymore......Don't you get it? Back then and now...... I love you, Rikka! Your heart, your body, they're all mine. I won't let anyone else have you!What are you doing leading other men on?