When a transmigrator who can freely transform into characters from the Honkai Impact 3rd game suddenly appears in Honkai: Star Rail, everything is going to change completely~
Otto: "Well, my old friend. I never expected us to meet again in another world."
Welt: "Otto!? What are you doing here?! Weren't you already dead?! What are you planning now?!"
Kiana: "Huh? Bronya?! Wow! You! You've gotten taller! But your chest still isn't as big as mine. Mei could never like you!"
Bronya: "Who is this? Being around her always makes Bronya angry. And who's Mei?"
Bronya: "Seele... Is this what you look like when you grow up...?"
