Got to be honest, this one is my favorite of the dev's three May Wolf entries, by a long shot!
SPOILERS to follow
While it shares some weaknesses with the other two entries (such as the lack of narration), I think this limitation works far better here, in this setting, than in the other two stories. At certain points the protagonist acts for all intents and purposes as the narrator, which feels appropriate in this particular story (which is all about this character's self-exploration), and the cassettes provide a nice excuse to be jumping around in the timeline. The premise of the story is also something I very much enjoy.
The one weakness of the story is that I don't really buy its main conflict: the story is trying to sell what the protagonist does as a "sacrifice" (give up his memories). But we don't get to see any happy memory after the love interest dies, so the sacrifice feels hollow at beast. Not to mention, it's a second chance at life when the protagonist already died. I think this plot point, which ends up taking a lot of space, doesn't feel very satisfactory. Everything else I enjoyed a lot though!