Toaru Majutsu no Index: New Testament - Volume 16, Chapter 2: Attacking a Base with a High-Class Girl - Tower_of_the_Crystal.

In the year 1368, at the end of July, deep crimson shall descend from the heavens.

- Description from Novelupdates

This novel is also known as My Apocalypse Domain

On doomsday, Tang Yu unexpectedly got the Lord of the End System, he remained very calm.

Lack of experts? I will construct a pub so I can make ten draws in a row; 　　

Lack of food? I can’t be too cheap with the large pack full of food supplies sent from the market;

Lack of safety? Arrow Tower, Mage Tower Artillery and all kinds of automatic defence buildings. Having many isn’t too many;

Lack of equipment? Workshop production must produce high-quality items. Sir, would you like one? We are having a 20% discount special at nine!

…………　

In short, this is a story of Great Lord Tang building up his territory, attacking some monsters, and ripping off…… Cough, making some money at the same time.

- Description from Novelupdates

This novel is also known as The Silent Cherry And Plum Blossoms

This is an age-gap story. Bai Fumei Gentle Royal Sister & Ruan Meng Xueba Girl HE Xiang

Tao Anzhi: Yanxi, do you love me?
Yan Xi: Tao Tao, of course I love you.
Tao Anzhi: So do you like me?
Yan Xi: Tao Tao… I can’t…

Content tags: A match made in heaven
Protagonist: Yan Xi, Tao Anzhi ┃ Supporting roles: Gao Jiming, Liao Chengyu, Xu Jiaer, Yang Mengmeng ┃ Others: cultivation, age difference

- Description from novelbuddy

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.