There is One New Rule Every Month Globally - Chapter 26 - : "Wait, does this make sense?

Volume 1 (Set between volumes 13 and 14)

A series of short stories set before the events of volume fourteen including how Team GROUP was formed.

Volume 2 (Set between volumes 16 and 17)

A series of short stories including two separate meetings between Touma’s and Mikoto’s parents, two tales involving two of the Level 5s of Academy City, and other funny stories involving some of the characters.

Su Ci was forced to marry the dying Second Master Shen, and the entire S City awaited her tragic fate. However, half a year later, Su Ci cured Second Master Shen and was adored by the Shen family. She is a personal disciple of a miraculous doctor, a top hacker, a racer, and the founder of a globally popular cosmeceutical brand. International conglomerate CEO Xiao Yizhou, genius director Lu Mingchen, and e-sports god anti all declared: “Su Ci is our dearest junior sister!”The man, rumored to be cold and violent, cornered Su Ci against the wall, gritting his teeth: “How many more identities do I not know about?” Su Ci smiled warmly and kissed the man's lips, “Just one last one, Mrs. Shen.”

Sky is not born of Shen Huan, millennium is like night.

This is a rebirth who wants to release himself, and has an interesting life story after getting a less serious system.

- Description from Uukanshu

Synopsis is in the beginning first chapter, so you can try to read it first.Zhang Fei is an ordinary human, but he is also an Incubus, and he also a Heavenly Fox.