For those who wondering any weird situation in there, I suggest reading the light novel. It's a masterpiece and many sweet moment between Ai Fa and MC.
Although the art is very exemplary, I can't help but think that the execution of this part of the story is out of place. I just can't put my finger as to why I'm feeling like this.
this manga and this scene has unnecessary fan service and they made Ai Fa and the other girls look stupid during the bathing scene not to mention the translations...
the LN is much much better id recommend everyone to DL the chapters soon, since they light novel has been recently licensed and sky is going to delete them