My Love Story with Yamada-kun at Lv999 manga volume 5 features story and art by Mashiro.

After a night out with their friends, Yamada and Akane finally make their feelings known and become an official couple. While Yamada is busy with cram school and final exams, Akane meets a new friend in the game—a girl named Yui.

Soon, the two girls are making plans to meet in real life, but guild master Eita is worried Akane is too quick to meet strangers—and he might be right. When Akane meets Yui for dinner, Yui's boyfriend shows up unannounced. As it turns out, he's from a rival gaming guild and his intentions are anything but pure.