After Nyuudou withdraws from Hyakki Academy, it’s up to Haruaki and the rest of Class 2-3 to bring him back! Nyuudou’s father refuses to budge, however, so they issue a challenge—if they can infiltrate his home and retrieve Nyuudou, he’ll come back to school and rejoin the class! But Haruaki has no idea who he’s up against, and if he fails, the school will lose a lot more than just one student...

Rookie teacher Haruaki Abe is as cowardly as they come. It's hard enough for him to handle human students without whimpering-and now he's going to be teaching at a school full of monsters?! It's a classroom of horrors for Haruaki, as his mischievous students use every means at their disposal to prank him! Will this poor teacher be able to get his group of ghouls under control, or is this class destined for failure?

Just when Haruaki thinks his parent-teacher conferences are done, Mame's dad asks him to stop by the family home for a visit! But there are more than a few surprises waiting for him, and depending on how everything goes, Haruaki might end up with a bride, a death sentence...or both!

Hyakki Academy’s Night Parade Culture Festival has begun, and Haruaki’s kicking things off by issuing the students and teachers a challenge—anyone who doesn’t escape from his maze within thirty minutes will be forced to wear a sailor uniform for the rest of the day, and he’s taking the competition very seriously! But when Haruaki later heads to the school’s basement, he finds himself in another festival entirely...one run by the dead! Will our resident scaredy-cat make it back to the land of the living, or will he be trapped in the underworld for all eternity?

It’s time for Class 2-3 to go on a four-day, three-night trip to Kyoto! Having been warned by both his students and fellow teachers, Haruaki’s sure to be on his best behavior...if he can help it! But when he visits a shrine dedicated to his ancestor, Abe no Seimei, he suddenly finds himself in a vision of the past...

A forbidden partnership forms?! "BTOOOM!" and its trademark bombs have decimated both the island playing field and players alike, but is the final stage of this live death-game now in sight?! Tsuneaki Iida, programmer for Tyrannos Japan, shares key information about the game's masterminds and the conspiracy, and he lets Ryouta in on a secret function hidden in the BIMs, asking him to take down the game's system. Still plagued with doubt, Ryouta steels himself for battle and carries out his do-or-die plan to hijack the Tyrannos Japan helicopter. There's no turning back now!! But the price Ryouta will pay for his operation is heavy...and an unexpected turn of events awaits!!

Expecting some summertime fun with friends, Haruaki heads to Rintarou’s house, where his hopes are soon dashed. He learns about the darkness Rintarou’s been living with for years, and before long, he is forced to confront it himself... In the midst of such danger, does Haruaki have what it takes to prevail, or will he need a few more sailor uniforms to pull through?