Okay, if think I have a theory about this story so far and even though this is a guess I'll relay my thoughts has a spoiler.
Okay, first of all, I think that Maki-sensei and Chie-sensei are also twins (based on the 4th chapter, where Chie suggests to switch with Maki for the date with Ako).
Which leads to my second theory that Ako has actually run into Chie-sensei (disguised as Maki-sensei) at the end of chapter 5 and Chie is the one inviting her to her apartment (probably trying to ruin their relationship which is a bit opposite to Komachi's approach).
So basically we have two pairs of twins that although have different personalities, their relationship with their sibling is very parallel to each other. In the case of Ako, she feels inferior in her looks compared to her sister. While Komachi feels that she and her sister are the same and will be together because of that.
In the case of Maki-sensei and Chie-sensei, although, it isn't totally clear, I think that when they were teens, Maki enforced her principles onto Chie and it felt to Chie that she was being forced to be similar to Maki causing a rift between them and becoming distant with each other (in the 2nd chapter it is implied that Chie and Maki were not together during their university years), but Chie seems to have feelings for Maki and is trying to get back together with her, hence she is trying to sabotage Maki's and Ako's relationship.
last edited at May 26, 2020 10:23PM