In a world recoiling from the effects of the virus "the Dolor," (alt. Depression AIDS), our protagonist Blackiris must use his "mneumonicide" powers to suppress the traumatic memories of his "guest," La to cure her psyche corrosion. A masterwork of the classic Visual Novel (or general storytelling technique(?) of immersing you into the world & making you like the characters, then giving you an emotional nutpunch in a manner that's too good to spoil.

And if you did read it, my man Adze made a great video on that scene which catapults this VN from "solid and enjoyable" to "holy moly." ~ https://youtu.be/J1mSC3apSoc