An Introvert's Hookup Hiccups: This Gyaru Is Head Over Heels for Me! Volume 9 by Yuishi

After his lovey-dovey display with Nanami at the school festival, Yoshin feels more part of his high school class than ever. As the bonds between him and his classmates grow stronger, Yoshin realizes that the annual sports festival will soon be upon them. Newly determined, Yoshin decides to seriously participate, with Nanami vowing to cheer him on in her own special way! Plus, the end of the sports festival means the beginning of preparations for their graduation trip—to none other than fabulous Hawaii! As the couple gears up for their first overseas trip, they seem to be preparing more for a honeymoon...? Get ready for another round of memorable events for these young lovebirds!