So, this is why the girls' mother acted like she knew the MC. They probably moved here on purpose to be close to him. Maybe she wanted to entrust her daughters in his care, since she's busy with work? The only thing I have no idea about is why she hasn't met him herself yet.

なるほどー。まるでどこかのマンガのような運命的出会いですな。

もしやそのお姉さんは……世間は意外と狭い。
ロッティー最大のライバルは思わぬ人物。