Yuta, who returned home after a long time, learns that his childhood friend Suzu has her first boyfriend. Although they had never seen each other as potential romantic partners since their student days, Yuta feels somewhat complicated. To such Yuta, Suzu consults, 'I want you to be my practice partner for blowjobs.' Yuta initially refuses but is made to use a dildo to practice fellatio with Suzu. Suzu diligently practices for her first boyfriend. However, Yuta lies and teaches Suzu rough deepthroating, saying 'This is normal.'
