Chapter 40

“High School Boys and Older Brothers” is the 40th chapter of the manga.

Cover Page
End scene of Chapter 39. Evidently as a continuation of the talent show, Hidenori and Yoshitake make milk come out of their noses.

Detailed Summary
At a café, Tadakuni’s and Yoshitake’s sisters are seated next to a tall bespectacled boy in casual clothes. He turns out to be Hidenori’s older brother Yūsuke, who nervously sips his drink and asks the girls what they wanted to talk to him about. Yoshitake’s sister tells him it was about their respective brothers. She says they aren’t kids anymore, and should learn to act their age. She also points out that he was their ‘leader’, and that they used to go on ‘indoor adventures’ together in the past.

He sheepishly admits it, and Yoshitake’s sister says that if he told them to behave, they’d listen. Yūsuke concedes this and Yoshitake’s sister, briefly changing track, asks him if the girl who accompanied him to the café (who is standing nearby) was his girlfriend. He replies that she is. Suddenly, Yoshitake’s sister gets up, slams the table and loudly asks him when he’d recognize her feelings for him.

He is bewildered and asks her what she’s doing, and Tadakuni’s sister notes that his so-called 'girlfriend' doesn’t react at all. Yūsuke, blushing, admits he was lying and that the girl was just a senior at a club of his. Yoshitake’s sister is agitated and asks him why he lied like that, but he shrugs it off and tells them to get back on track.

They continue about the boys, and Yoshitake’s sister points to Tadakuni's sister at one point and tells Yūsuke that they stole Mei’s panties. He sympathizes, and he adds that they also did something horrible on Christmas Eve. He asks if that was the time she was bawling all alone in town and tells her he’s never seen her cry before that. Seeing her react badly, he cuts himself off, but it’s too late. She asks him how he managed to 'see' it and doesn't let him speak, declaring that they must have sent him a snapshot on his phone.

On cue, Tadakuni’s sister puts Yūsuke into a headlock. As he struggles to move, Yoshitake’s sister reaches for his pocket to get his cell phone, and he yells in despair. She ends up pulling out a pair of panties instead and expresses confusion. Tadakuni’s sister identifies it as her own underwear and twists her arm further in anger, crushing Yūsuke’s spectacles.

Characters
In order of appearance:
 * Tadakuni (cover)
 * Hidenori (cover)
 * Yoshitake (cover)
 * Tadakuni's younger sister
 * Yoshitake's older sister
 * Yūsuke
 * Yūsuke's senior