Responses
Yea I'm wondering too
The art work look like Higashino You.
I don't know about the story.
It kind of looks like effectively a story by Higashino sensei, probably http://www.mangago.zone/read-manga/yokubou_no_shizuku/ but I don't remenber that particular scene on any of her works, and she's my favourite mangaka by art
http://www.mangago.zone/read-manga/oboreru_kemono_no_koibito/mrs/manga/oboreru-kemono-no-koibito/v-1/3/38/