Akame Ga Kill!: I Am Death, Oberger

[Multiple heroines] + [transmigrated in person] + [no System] + [two Imperial Arms users] + [no tragedy or angst] + [slice of life] + [invincible] The pacing is a little slow! Multiple heroines, doting on his younger sisters, not mindless, lots of content. If that's not your thing, please be patient... Merlin suddenly finds himself in the world of Akame ga Kill! and is adopted by the head of the Oberk family, who names him Merlin Oberk. Meilard unexpectedly becomes Merlin's adoptive sister, though they share neither parent. The story begins with the formation of the Empire's assassination corps. Merlin, the Empire's youngest general, becomes its inspector so he can save the beautiful women from the original story. From the start, he takes Main, Akame, and Kurome in as his younger sisters. He watches Akame, Kurome, Koro, Bonnie, and Chikushi grow up in Longxi Village, then looks after Kurome, Main, Sheele, and Hill in the Imperial Capital. In the dark, corrupt Empire, Merlin must grow stronger to protect his sisters. Najenda: “Merlin truly has the people’s best interests at heart! I’ll always stand by his side.” Esdeath: “You’re strong, Merlin. One day, I’ll conquer you your way!” His other sisters: “Big Brother Merlin cares about us so much, even when we’re fighting the Empire.” After the Empire is overthrown, Merlin turns to look at Najenda, Esdeath, Meilard, Leone, Cornelia, Taeko, Chelsea, Hill, Chikushi, Bonnie, Gin, Akame, Kurome, Main, and all the maids who serve him closely. Then he looks at Tatsumi, who has fully transformed into a dragon, and can only say, “I’m sorry, but they’re my sisters.” [The synopsis doesn’t do it justice. Please read the story itself.]