The final chapter of Seirin's "Voice" series of short stories (the titles of the three stories are all related to sounds) ~ is also Mitobe's birthday message...
The title follows the M from the first two articles, and the N is followed by O... It has something to do with the text, and it does, so you can use your imagination.
This article is about Koganei being a bit slow and not realizing Mitobe's feelings at all, and wants to introduce him to his girlfriend as a birthday present.
However, when he really got a "girlfriend", Koganei...
Seirin's "Voice" Series One:
Seirin's "Voice" Series 2:
Intention: