To Kill That Which Cannot Die ​After his success in battle with a demon, Lugh is made a Holy Knight by the Alvanian Kingdom and tasked with slaying more of the creatures. The problem is, only the hero can actually fell demons. Such a setback isn’t going to stop the world’s greatest assassin, however, and Lugh gets to work devising a spell to kill the supposedly immortal beings. Unfortunately, the only way to test this new magic is in a real battle! Failure promises certain doom, but triumph may turn out to be just as perilous if Lugh isn’t careful...

After Lugh and Epona's victory over the demons who attacked the RoyalKnights Academy, House Tuatha Dé is charged with subduing themonsters. Though demons are supposedly immortal, Lugh combines his ownknowledge with a new power bequeathed to him by Epona to develop a way oftaking them out. "There's nothing I can't kill. I'll make quick work ofyou!"

“I’m going to live for myself!” The greatest assassin on Earth knew only how to live as a tool for his employers—until they stopped letting him live. Reborn by the grace of a goddess into a world of swords and sorcery, he’s offered a chance to do things differently this time around, but there’s a catch...He has to eliminate a super-powerful hero who will bring about the end of the world unless he is stopped. Now known as Lugh Tuatha Dé, the master assassin certainly has his hands full, particularly because of all the beautiful girls who constantly surround him. Lugh may have been an incomparable killer, but how will he fare against foes with powerful magic?

The most dangerous prey… When the most accomplished assassin on Earth meets his end just before retirement, he finds himself standing before a goddess. Her world is headed for disaster, and she has need of his particular set of skills. Armed with powerful new abilities and decades of deadly knowledge, he begins his second life as Lugh, young scion of the Tuatha Dé clan of assassins. His mission: to find and eliminate the strongest individual in this world—the hero!

The Assassin Meets the Hero ​Lugh, Dia, and Tarte enroll in the most elite academy in the Alvanian Kingdom. On the surface, the group is there to learn how to be knights, but Lugh’s real goal is to get close to the hero he’s been tasked with eliminating. However, Lugh winds up getting more familiar with the hero than first intended, and he learns that the prophesized savior’s power comes at a steep price. Being a hero isn’t easy, and when trouble strikes, will the assassin have to save the one he’s supposed to kill?

Unexpected Allies... and Enemies ​During a party in the royal capital, Lugh runs into Mina, the mysterious and flirtatious snake demon. Evidently, she’s already infiltrated human society, but not to take it over. She’s not too thrilled about seeing the Demon King revived and wishes to help Lugh prevent that from happening...or does she? Mina seems to have her hooks in many different important people: nobles, princes, and even Lugh’s friends. Will this wolf in sheep’s clothing manage to turn classmates against one another?

To become the head of the Tuatha Dé, Lugh must travel to the commercial city of Milteu and become a merchant there. Joined by Tarte and a new assistant, Maha, his plan to assassinate the hero seemed to be coming together, but...

A wicked plot in the heart of the kingdom! Three demons have fallen, and Lugh wastes no time preparing new tools to handle the next one. Unfortunately, he’s interrupted by a conspiracy in the royal capital. It seems someone wants to frame him for murder. Whoever this cocky person is obviously doesn’t know who they’re dealing with. In the midst of this, another demon appears, and Lugh receives a visit from the goddess who sent him to this world. The discussion with her leaves him wondering if perhaps there’s more to why he was reincarnated than he first presumed...

Lugh's fight with the formidable Setanta comes to an end-but will his assassin's trump card actually reach his overpowered opponent!? Then, when Lugh enrolls into an elite academy, he finally meets his target: the hero!

BUTTON MASH TO VICTORY ​On the verge of flunking out of Grand Swordcraft Academy due to his total lack of talent, Allen Rodol’s life goes from bad to worse when the class prodigy challenges him to a duel where it’s win or face expulsion. However, the night before his hopeless bout, a mysterious hermit grants Allen a button that will give him one hundred million years to train in an alternate reality when pressed. Allen not only gladly accepts the offer but also goes back for seconds, thirds, tenths even! With over a billion years of straight practice under his belt, the world is about to see what the “Reject Swordsman” can really do!