* CrossoverShip [[ShipTease Tease]]: The non-canon IntercontinuityCrossover seemed to ship Shinagawa with ''Manga/FairyTail's'' Lucy.
* EndingAversion: The ending seemed to confuse the hell out of a lot of readers. [[spoiler:having Daichi graduate and becomes a teacher to boot with everyone else growing up, while Adachi goes away for four years and reenters Daichi's life ''still as a high school student at the school he now works at'']] will probably do that to you. The epilogue chapter in 2017 did quell some thoughts, but it's still a controversial ending.
* GermansLoveDavidHasselhoff: Is for some reason a rather popular manga in Italy, enough to have Miki Yoshikawa visit a comic con in Lucca.
* HilariousInHindsight: [[spoiler:Considering how Shinagawa and Adachi practically swapped roles before their transition to high school, the Japanese title takes on a hilarious new meaning. ''Yankee-chan to Megane-kun'', huh?]]
* RetroactiveRecognition: In episode 2 of the drama -- [[Series/KamenRiderOOO Eiji]], when did ''you'' become a high school student?