I just read the last chapter form Chinese web, and because I don't know Chinese so I just guess form the image. I want to know my guess is right or not, because if it's right, the ending would make nonsense to me.
Asagiri-senpai still choose Himari in the end. It look like everything she and Airi had in the manga is nothing. Actually it's OK, she she has her loyalty for Himari. The fact that Himari just accept her confession is surprise me more. At the beginning of the manga, she is still support Kokomi and senpai become a couple. Now she know her sister is in love with senpai, yet she still choose date her. It's just make nonsense to me
And it's look like the manga got axed. In the end we don't know how is Airi doing after getting rejected, how is she recover from the heartbreaking