Not everyone forgetting Mai because of Satsuki and Ajisai arc. Did ya'll forget that Mai jumped down from the school building with Renako? She even tried to spare her time after a tight schedule just for Renako. She also still keeps her Rema-friends relationship with Renako even thought she wanted more than that, but she kept a hold of herself so that she wouldn't make Renako felt uncomfortable with her. She is not just a pervert like ya'll thought. In chapter 38, she tried to hold herself from her desire and only kissed Renako 3 times just so that she wouldn't feel like defeated by Satsuki. She accept Renako and understand that Renako just want her as a friend.
A little bit spoiler :
The author will show the story from Mai's perspective to show her efforts for Renako
(I cant believe I just defended a fictional character more than myself)