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绝对会变成BL的世界VS绝不想变成BL的男人
故事延续第三季的结尾，路人同时被高中生旗野与同学菊池告白，勉强安抚他们之后，总算又回到平凡的日常生活。随着毕业季到来，中学生互赠第二颗钮扣的画面，让他察觉恋爱气息正在逼近。更糟的是，他患上花粉症，湿润的双眼与泛红的脸颊成为致命的FLAG，任何瞬间都可能被误会成恋爱的开始！路人能成功避开BL命运？或最终坠入BL的世界？ ☆绝对BL最终大结局，犬饲贵丈率原班人马再创BL宇宙 ☆爆笑完结篇！恋爱FLAG全面暴走，帅哥包围日常再临！
在满是恋爱氛围的春天，路人誓言绝不陷入BL世界，却被「花粉症」引发的浪漫危机包围！
当好友请他假扮恋人，路人再次被卷入暧昧风暴，假装的距离是否会变得太真实？
意外的睡着引发暧昧危机，路人警戒着BL定律，却又陷入教授低音的催眠魔咒。
下周就要考试了！路人加入读书会，但只剩两人独处读书时，他意识到正走向危险的方向。
路人一次又一次被逼到恋爱边缘，即使借错雨伞、重访旧地，也出现意想不到的暧昧！
绫人和恋人东条阴错阳差到幼稚园职场体验，却引发了东条的甜蜜与嫉妒。
Mob tries to dodge a BL flag when Kōji picks a fight, only for the heroic Seigi to appear and turn chaos into destiny.
A matchmaking mishap puts Mob on alert, but overeating soggy fries leads him to trigger an even bigger BL flag.
Mob dodges every Christmas BL flag with a perfect plan, only to run into Hatano while Kikuchi secretly watches.
Mob’s nap sparks a massive BL flag when Hatano catches him sleeping, forcing him to choose an unexpected escape.
Mob shelters an extremely unlucky classmate, only to invite a disaster even scarier than a BL flag into his home.
On Valentine’s Day, Mob dodges BL fate by running a cake errand—while desperately avoiding the boy who likes him.
