Mangaka is definitely a fighting game fan. Not only does Tamaki's work bouncer outfit and kicking stance make her look like a tan and dark haired version of King from KOF, the Calvin Klein parody text on her underwear says "Johann Petrovich", which is one of the aliases of JP from Street Fighter 6 lmao
Also, if there was any doubt about why Tamaki stopped Kiyotaka when they were getting ready to check out of the hotel, note that on page 28, there are 5 empty cans of "Red Ball" on the table, but after they finally check out, there are now 6
