We start the chapter with Naoto and Luna already at the date venue. Both are dressed up for the occasion, and are currently waiting for Mimi's group to arrive. Mimi's was pushy with her messaging that Naoto couldn't find the chance to decline. She mentions bringing along a guy friend, so it'll be a karaoke double date. Just as Naoto was wondering who Mimi will bring, Mimi and her partner arrives.
It is none other than ya boi, Ryuuji. Ryuuji is glad to see his Aniki once again, and was surprised that Naoto and Mimi attend the same college. The group exchanged greetings, and Naoto asks Mimi how she knew Ryuuji. Mimi tells Naoto that she and Ryuuji go way back. But ends that line of thought by immediately taking Naoto's arm and aggressively pushing for the event to be a true double date. Everyone was caught off guard, except for Ryuuji, who was still too dumb simple-minded to notice. Ryuuji looks like he's been hitting the gym, tells Mimi that he's not longer just dumb muscle thanks to his Aniki, and mentions being beside him would be too much for Luna's heart.
Luna whispers to Naoto, telling him that despite Mimi calling it a double date, it's just karaoke so he shouldn't mind it too much, as whoever had fun wins. Naoto tries to reason to himself that it's just karaoke, but their sitting arrangement is bothering him. Ryuuji is sitting beside Luna, while Mimi is beside Naoto. Naoto calms himself by reciting prime numbers remembering that Ryuuji is mostly harmless, but notices Ryuuji, who now looks like he'll fit in Jojo part 3, staring at Luna's cleavage with a serious expression.
As Naoto is calling out Ryuuji in his mind, Mimi strikes. She asks which song Naoto will sing, but he doesn't know the latest and trending songs at the moment. Mimi clings closer to Naoto, and Luna notices her. The two are about to start their little war for Naoto, but it gets interrupted by Ryuuji, suddenly pulling on Luna asking her to sing with him. Ryuuji asks Luna to do the woman's part of the song, as it is too high for his own voice. Luna looks for the other mic, but Mimi is holding on to the only other microphone. Mimi then tells Ryuuji to share Ryuuji's mic with Luna instead, and Ryuuji obliges with sharing the mic, pulling Luna closer instead of handing the mic over.
Luna is looking awkward with Ryuuji being too close, and Naoto sees it. Mimi is obviously manipulating Luna away from Naoto by using Ryuuji, and she pushes it further, as she mentions Luna and Ryuuji's past part-time work relationship. Ryuuji notices Mimi talking to his Aniki, asking what they're talking about, but Mimi says it's nothing important and decides to sing next. Mimi starts to sing as the mood gets awkward only on Luna and Naoto's side.
Time passes and Naoto is getting drinks, recalling that he never really went to karaoke even back home. Luna passes by, heading to the restroom, and teasingly praises Naoto for being good at ballads. Naoto retorts that it took his all just to keep up with Mimi and Ryuuji. All that singing got the two sweating, and Naoto then asks Luna a question.
Naoto asks Luna where she usually hangs out. He mentions that back home in the countryside, there's not much choices for him to do during his high school days, and wonders how Luna spent hers. The mood shifts and Luna tells Naoto that it's probably not worth hearing about it as it's not interesting.
Chapter ends as Luna tries to escape using the restroom as her excuse.