Just like the show, this review will be short and sweet.
Do not expect too much from Nee Sensei, Shiranai No?. It is meant to be cute, fun, romantic, and mildly sensuous. It is fluff, but the kind of fluff with a bit of quality behind it. Eiji Akaso is delicious as Riichi and pairs so well with the cute Fumika Baba. They have a solid romantic zing that I found very convincing. Plus we have some almost real kisses. Not as good as Yamapi in Buzzer Beat (who is?), but still at least a 7 on my personal J-drama kissing scale.
The story is sweet and predictable, but I liked how Riichi pursues Hana with so much confidence and tenderness. It's just cute. If you like cute with some fire, then you should watch it. If not, watch something else more to your taste. It's fine. I do that all the time!