The World's Strongest Rearguard: Labyrinth Country's Novice Seeker Light Novel Series by Tôwa, Huuka Kazabana, とーわ

After living life as a corporate lapdog, Arihito is reborn in a fantasy world. Strangely, the class he's assigned is the very ambiguously titled Rearguard... moreAfter living life as a corporate lapdog, Arihito is reborn in a fantasy world. Strangely, the class he's assigned is the very ambiguously titled Rearguard. It seems weird, but Arihito soon figures out that though it isn't flashy, he's gained the ability to do just about everything in battle, from assisting attacking and defending to healing! As he begins his new life, he quickly gathers curious companions: his old supervisor who's younger than he is, a mysterious demi-human mercenary girl, and a gorgeous high-level swordswoman. With this bevvy of interesting ladies in his party, his journey as the greatest supporter that's ever lived! less

After a successful encounter with the hidden deity Ariadne, Arihito is ranked number one in the eighth district, where he continues to flex his powers as a Rearguard. Though he's far from getting used to dealing with his hyperactive team, he manages to secure the rights to fight in the seventh district-when he finds himself in the middle of an unexpected setback. Will Arihito be able to protect the city from a violent stampede of monsters?!

Arihito and his party have at last moved up to District Seven, and the Hidden God Ariadne is becoming stronger day by day. Everything seems to be going smoothly except for one particular obstacle: the district's top-ranked alliance, Beyond Liberty, and their monopoly over the labyrinth's hunting grounds!

Arihito and his party are making tremendous progress towards District Six when the unthinkable happens: a Named Monster attacks the top-ranked alliance Beyond Liberty and steals their leader's soul! Only Arihito's group is capable of defeating this creature and saving the leader's life...but what path will they take now that this rival alliance no longer stands in their way?

After their many triumphs against powerful Named Monsters, it’s time for Arihito and his party to take a much-needed break! Their first post-reincarnation vacation brings them to a health resort managed by the Guild, providing the perfect opportunity for the group to get to know one another even better. Rest and relaxation may not come easy for Arihito and his friends, though, because a familiar face from the White Night Brigade has an eye on Arihito’s infamous rearguard skills...!

Arihito faced off against the Shining Simian Lord in District Five and successfully rescued Elitia, but the curse this horrible beast inflicted on Theresia is destroying her bit by bit. In order to save his companions and defeat the Simian Lord, Arihito must seek a new power!