Man, this kid is one of the most entertaining MCs I've ever seen in manga. Always fun to see how he deals with problems - minimal angst, pointless hesitation, or acting against his own interests/character.
That was really cute, hopefully she get a nice boyfriend at some point. Maybe Nanba can introduce her to some non-delinquent types in his class. Perhaps the girl he likes (liked?) has a younger brother?
This has been an amazing series so far and I applaud your trans/scans of the series. Please release more chapters quickly.
Also as stated below, Nanba is an excellent example of an MC done right. Hope to see more in the future of his character development.