The boy who has been dating Kashiwagi, thanks to Shirogane's help, comes back yet again for more relationship advice from Shirogane. But something seems different about him. With his return from summer vacation, he has completely transformed into a player. Getting advice was just an excuse to brag about his girlfriend to Shirogane and Ishigami, and the two suspect that he has "experienced nirvana." They decide to leave the couple alone and observe them from afar as the two lovebirds start to get into a romantic mood...
Just the two of us celebrating his birthday
would be something a couple would do!
!الاحتفال بعيد ميلاده وحدنا سيبدو كشيء يفعله الحبيبان
Zu zweit Geburtstag feiern!
Das ist ja so, als wären wir ein Liebespaar!
¡La celebración
de su cumpleaños a solas
Una pareja celebraría
el cumpleaños los dos solos.
Seul un couple peut faire
une fête en tête-à-tête !
सिर्फ़ हम दोनों द्वारा उसका जन्मदिन मनाना
Só nós dois juntos comemorando
Отпраздновать день рождения вдвоём! 
Прямо как настоящая пара!