Toaru Majutsu no Index: New Testament - Volume 7, Chapter 2: The Wandering Beast and Outside the Cage. Dead_Girl.

At the age of seventeen, Xie Xiao Qiu met “him.”

Since then, “he” was engraved on her heart, an unforgettable existence.

Since then, she has been imprisoned by love to the point of madness.

“He” is called Wang Li Chuan. `

Six years ago, her boyfriend Li Chuan left without saying goodbye. Thereafter Xiao Qiu becomes the prisoner of love. She does not understand how such an intense and strong love could vanish overnight. The mystery of Li Chuan’s disappearance shatters Xiao Qiu’s heart. When they meet again Xiao Qiu wavers between advance and retreat. In the face of such a good and patient man, she suddenly understands happiness is never easy to grasp. Crippled or perfection is always accompanied by shadow.

An incredibly athletic older brother, Tenryu Taiga. A programming genius girl, Tenryu Fuyuki. The two siblings separated for eight years ended up living under one roof again after facing the problem – a lack of funds for living expenses.

Fuyuki proposes a way to earn money, a core system deeply involved in people’s daily lives, a game that awards you money as a prize for defeating malicious bugs in cyber world, the 《Aries》structure. Taiga after becoming a warrior in the game relying on his inborn senses, is puzzled by the unfamiliar sensation.

One day Saionji Rui, Fuyuki’s best friend appears and is attacked by a mysterious bug― “I’ll be waiting, my prince.”. Hybrid fantasy battle of cheating siblings begins here!

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates