Bungo Stray Dogs: How Is My Companion Spirit a Member of the Deadly Sins?!

This is a unique world where people can have a bonded spirit. Only a select few awaken their own spirit from birth. A bonded spirit is bound to its master by fate. They live and die together, and their lifelong bond can never be severed. They can see and touch each other, and a bonded spirit's appearance and age never change. Like a doppelganger who has crossed over from another world, it shares a bond with its master that feels like a lifelong companionship. The three girls Qiao Shiyan, Xu Ruoyin, and Chu Molan travel together, each accompanied by a bonded spirit from the world of literary masters. Qiao Shiyan is bound by fate to Osamu Dazai from his Armed Detective Agency days. The girl and her spirit are inseparable, staying by each other's side year after year. Xu Ruoyin is accompanied by Sakunosuke Oda from a time long past. A bond that transcends time and space ties them firmly together. Chu Molan, meanwhile, has Ango Sakaguchi of the Special Division for Unusual Powers by her side for the long haul. The girl and her spirit keep each other company day and night, never parting and never giving up on each other. The girls walk side by side, laughing and enjoying each other's company. Their three literary spirits remain hidden in the present world, silently protecting their respective masters. The girls' everyday youth in the present world intertwines with the fated bonds of literary masters from another world. Their friendship is warm and enduring, while the bonds between masters and spirits are impossible to break. Amid the ordinary bustle of campus life, three bonds of mutual devotion slowly unfold. The girls journey together, their spirits by their sides, bound for life as they embark on a promise of shared existence that will never be broken. (Yeah, that's right. I came up with this on a whim, so I might stop updating and disappear at any time. Each girl is based on someone in our class, and they're all real friends. This is adapted from real life.) No romance!!!