The Great Mage Returns After 4000 Years - Chapter 3 - The Academys Worst Student (3)

She had loved him for many years, and she forced him to break up with his girlfriend and marry her using the most despicable means. After getting married, she carefully nurtured their marital life, hoping to touch his heart, but he didn't care about her at all and wanted to reconcile with his former lover.Later, her mother passed away, and she also had an abortion. She finally gave up and decided to divorce. However, after seeing the divorce agreement, he did not readily agree, saying, “Sweetheart, do you really think you can get rid of me by divorce?”

His Royal Highness the King of Han, who was afraid of the dark and ghosts and loved to cry, has always been the good baby of the princess.
Until one day, His Royal Highness the King of Han found a book in the bookstore…
Picture book?
Content tags:
Search keyword: Protagonist: King of Han, Princess of Han

- Description from novelbuddy

Bound together by an imperial arranged marriage, Li Yuyan is scorned for her association with the ill and blind crown prince. Publicly, she stands up for the seemingly gentle and perfect prince, and he in turn protects her from criticism. Privately, she contemplates inheriting a fortune if he dies, while he considers eliminating her if she steps out of line. Unknown to all, the beauty and brilliance they keep hidden will unveil. During their wedding night, as she cures his blindness and cold ailment, but not his secret illness, she discovers the deceit. Realizing she's been tricked, she tries to flee, only to find herself trapped by him as he expresses his fascination with her.

Long Fei, a cross-timer and doujin, is an otaku who traveled to another world. In the original world, he was an otaku fan of Gundam and military science fiction.

He died in an accident and was reincarnated into another world. The Gundam works he had read before his death and the techniques in various military novels could be brought to another world.

How would he use the Gundam that Long Fei created? What waves can be caused in this different world?

- Description from novelbuddy