Muboubi Kawaii Pajama Sugata no Bishoujo to Heya de Futarikiri

I've been asked by our homeroom teacher to help Koiro Makura, a classmate of mine, with her remedial assignments. When I went to her house where she lived alone, I was greeted by Koiro in her pajamas even though it's noon. She likes me and invites me in to her room, and we quickly form a close relat