Do You Love Your Mom and Her Two-Hit Multi-Target Attacks? - It Finally Happened

No. It's from the OVA released today.

The plot is that the son gets amnesia after being hit in the head, so he forgets that Mamako is his mother, and after that he almost immediately falls in love with her. A confession scene and a kiss end up following.

Then plot happens and he regains his memories, and the episode ends with a close-up of the expression of sheer existencial dread on his face.