My Girlfriend's Not Here Today by Iwami Kiyoko

Also known as Kyou wa Kanojo ga Inai Kara and KyouKano

Mgnht_01-02-03
Chapter 1: Contact released Jun 19 '21
Chapter 2: Endearment released Jul 22 '21 NSFW
Chapter 3: Carelessness released Aug 20 '21