For god sake Misaki, let your sister have a social life. You're too damn overprotective. I feel like the red color will be Aki and it will be for Reina's love confession. It seem Reina doesn't want to be just a friend for Reina and not like Yuuga who just want to be number 1 friend but Aki want be the kind of "special" friend from Shojo.
This left the realm of overprotection and has gone straight into possessiveness a long while ago. This is straight up messed up, but I said nothing because she hadn't Actually acted on those feelings, yet...
Aki's sister is the biggest mistery to me.
Is she jealous? Possessive?
Looks like before she was very carefree and even could let her sister be.
But now anything that Aki feels she gets worried. Wonder what happened...Maybe she feels guilty of something.