With the majority of their class and the entire capital wiped out, Yogiri and Tomochika left behind the Kingdom of Manii in search of additional Philosopher’s Stones, the energy sources they were told to gather if they ever want to make it back home. Having received one stone from the Sage Sion, a second from Risley, and having taken a third from the self-styled War God Raiza, the pair next set their eyes on a new country in the east, following a lead on the potential location of another Sage. With the half-demons they were assisting now comfortably settled in the City of the War God, the two have left their previous companions behind to begin their journey home. But of course, nothing is ever simple. One after another, strange new people begin appearing in their path to block their progress, and some of their former companions may not yet be willing to let them go...

After their entire class was transported to another world, Yogiri Takatou and Tomochika Dannoura were abandoned when it was discovered they had failed to receive the Gift, a special power that the rest of their class inherited from a powerful Sage named Sion. What none of the others knew, however, was that Yogiri already had his own unique power — one that multiple world governments back home were keeping him under observation for: the power of Instant Death! With Yogiri’s abilities now exposed and being scrutinized by Sages and Swordmasters alike, this unlikely duo continues their adventure, determined to find a way back to Japan. The only lead they have to go on is to follow their former classmates’ trail and track down the formidable Sion in the hopes that she’ll be willing to negotiate. But even with the power of Instant Death on their side, the world around them seems intent on making the task as much of a hassle as possible!

Yogiri and Tomochika are finally reunited with their classmates as they make it to the capital of Manii. But before they have time to even say hello, they find the class already burdened with a new task: to accomplish a great feat that would gain them recognition as potential Sages. As the two try their best to blend in and smooth over the rough feelings from their previous abandonment on the bus, the class begins making plans to take on the Underworld, a labyrinthine dungeon below the capital, housing a Dark God they must slay to prove themselves worthy as Sage candidates. Meanwhile, another estranged classmate makes her return, but with far more sinister intentions.

Having reached the island nation of Ent, Yogiri and Tomochika continued their pursuit of the Sage Yoshifumi and his Philosopher’s Stone, which led them into the Elven Forest. The forest proved to be more than meets the eye, however, as they discover that the space within it is warped and twisted, leaving them hopelessly lost with no clue as to how to escape. And while thanks to the machinations of a certain vulgar classmate they can hopefully say goodbye to the meddling of Malnarilna, it doesn’t take long before all sorts of other troublemakers start turning their attention towards the hapless pair, making their impossible journey through the Elven Forest even harder. And, wait, where did we leave those other three Philosopher’s Stones again...?

Leaving their growing entourage behind, Yogiri and Tomochika set sail on a cruise ship for the eastern island nation of Ent. But as always seems to be the case, things don't go quite as planned, and after attacks from pirates and the rebirth of an ancient High Wizard, they find their ship sinking with no land in sight. With the help of a mysterious ancient-dragon-turned-young-boy named Kouryu, they manage to escape the damaged vessel and just make it to shore in time. But as they continue on their journey to the Empire of Ent in search of the Sage Yoshifumi and the Philosopher's Stone he possesses, they are met with new obstacles as the twin goddesses Malna and Rilna finally begin to take measures to deal with Yogiri...sort of.

Awaking to absolute chaos and carnage while on a school trip, Yogiri Takatou discovers that everyone in his class has been transported to another world! He had somehow managed to sleep through the entire ordeal himself, missing out on the Gift — powers bestowed upon the others by a mysterious Sage who appeared to transport them. Even worse, he and another classmate were ruthlessly abandoned by their friends, left as bait to distract a nearby dragon. Although not terribly bothered by the thought of dying, he reluctantly decides to protect his lone companion. After all, a lowly Level 1000 monster doesn't stand a chance against his secret power to invoke Instant Death with a single thought! If he can stay awake long enough to bother using it, that is...

With the events of the tower behind them, Yogiri and Tomochika begin making their way through the Meld Plains, a foggy expanse of crystalline plants and animals, towards the capital, in hopes of reuniting with the classmates who left them for dead on the bus. After dealing with a short distraction on the plains, they manage to make it to the city but find that getting permission to enter may be a bit more complicated than they had first hoped. Meanwhile, another member of the class who had been abandoned wakes up in the ruins of their tour bus. Disoriented and critically wounded, she finds she is not quite as alone as she thought, and Yogiri left behind just the thing she needs to treat her wounds.