Nasa teaching lovesick high school girls while Tsukasa silently combusts with jealousy is the most perfectly stupid premise the franchise has found, and it mines comedy gold from watching her try to play it cool when she absolutely isn't. The show gets what made Season 1 work: two people who are already together finding new reasons to fall for each other anyway. Four episodes isn't enough to tell this story properly, but what's here proves the franchise still knows how to make you smile at the smallest moments between them.

Nasa's former junior high teacher, Ms. Yanagi, asks him to take on a programming class at an all-girls high school. Keeping calm among a room full of lively teenage girls proves harder than he expected, and before long the students are coming to him for help with their love lives: an unpredictable boyfriend, a hidden crush, and plenty of other romantic puzzles that no amount of code can fix. Meanwhile, Tsukasa acts unbothered, but she is secretly uneasy about Nasa spending his days surrounded by high school girls. The four-episode ONA is a romantic comedy with a slice-of-life feel, based on the manga by Kenjirou Hata.