NN - NickName

NN can also mean †žNice nut“…
By the way: Major Melons is one of the best nicknames I have ever heard…

I'm not going to debate whether indeed "Size Does Matter" (either figuratively or literally), but it seems that by his giving nicknames to Komine-kun ("Magnum") and Harima-san ("Major Melons"), the third party in all this (Sekine-kun) was unconsciously playing the role of "Wing-Man". It might have been a great pleasure for him to discover that he set up her own subsequent declining of his confession; some might consider that fitting payback upon him.

When all is said and done, this work is ... wait for it, ..... "APPROVED!"

Better hope she never finds a bigger one cause she's the kinda girl who would drop you in a heartbeat

With nicknames like those I wonder what their kid’s nicknames will be in the future.

... I... knew this couple in high school.
They have three kids and a store, now.

purely for the art and the sex scenes, i really like this chapter.
the contradicting mc is another matter. first he suggests to her to fuck another guy and then he sounds so possessive in his monologue at the end.