Torokeru kuchibiru
So much sex, so much drama!! They got back together in the end which is great, and honestly shared their feelings as much as possible.
Hotaru wa Ashita Shinu DJ - Enough
Aaaaand the spinoff! Mikami and Oono are together in this one, which is awesome. And there's a hint of drama (angst) in the brief glimpses that Asada's parents don't accept their relationship. Nimiya has tried to win them over, but they reject him (and Asada) completely. It's even mentioned that Asada lived with Nimiya's family for a while, and that probably explains why he gets along with Nimiya's mother so well. It's so incredibly grounded and realistic, including the sex (preparation and safety are very important). While the main story was just average for vibes, this oneshot is five stars easily!
Mou Ichido, Nando Demo