Novel's Extra: The Lost Heir of Dragon Queen - Chapter 51: Whisper of Rivalry

Wang Yi gets a key, opening a door in 2022 will lead to 1982, and opening a door in 1982 will return to 2022.

Two very different great eras appeared before him:

Abundant dietary protection, developed industrial products, miraculous medicines, and explosive information, this is 2022.

Simple folk customs, rich wild resources, scattered antiques, and treasures of the age, this is 1982.

Traveling between these two eras, Wang Yi didn’t think much of it, he just wanted to live a good life.

- Description from novelbuddy

5 years after the world changed, the final boss appeared.

Being given a chance and reincarnated is nice and all, yet why do I have to become that male friend who just watches the protagonist flirting with his harem?---World: Kaguya-sama: Love Is War - Hyouka ----

Introduction: Su Muge, a God’s favored girl in the medical community, became an ugly girl due to time-space travel. Her father disliked her and her mother was too cowardly to protect her! Xia Houmo, a lonely wolf who was haughty and ever triumphant in battlefield, was asked by the emperor to marry a useless and ugly girl! On their wedding day, there was an assassin and he took her as a shield, as a result, she was wounded. Su Muge smiled slightly with crimson eyes, “Xia Houmo, I owed you, and I pay you now.” Seeing her red blood, his heart hurt… “Su Muge, you owed me too much and you must pay me birth after birth!” The heroine was not beautiful and not omnipotent, but she had golden light and magic hand.