Toaru Majutsu no Index - Volume 15, Chapter 4: The Paper-Thin Difference between Self Derision and Pride. Enemy_Level5.

Immediately after Gu Changge realized he had transgressed into a fantasy world, the world’s protagonist, and fortune’s chosen, vowed to take revenge on him. Envied by all, he not only has the female lead head over heels for him but he’s also treated as a distinguished guest wherever he goes. Fortunately, Gu Changge’s prestige and power are superior to everyone else’s, so shouldn’t it be easy to trample on a mere fortune’s chosen?

If you had a chance to live again, what would you do? Earn money, hold onto a thick leg, just find someone to live a happy life with? Ha ha… Stepping on the beat of the times, riding the wind and breaking the waves, strategizing, using your knowledge to change yourself, and everything around you, come back! The reality flows to the plot, the golden fingers are thick, slow, and cool.

- Description from Novelupdates

Whoever insult the Jerivians is insulting my fiancee and insulting my fiancee is insulting me.

An alliance marriage was arranged between two rival Kingdoms – Qalagon and Jerivia. The agreement was that the Crown Prince of Qalagon will marry the Princess of Jerivia.

But due to an assassination attempt, the Princess of Jerivia was in a coma just weeks before the wedding. If the alliance marriage fails, then what awaits the two Kingdoms was an unprepared war.

The female Army Commander of Jerivia Kingdom was tasked to take on the identity of the Princess and fulfil the alliance marriage.

As such, the infamous Commander of Jerivia, Iria Alewine disguised herself as the Princess and meet the aloof yet powerful Crown Prince of Qalagon, Arin Helev…..

No less than three months and no more than six months. We need just that, Commander Iria. Stay at Qalagon as the Crown Prince's wife during that and when you come back, you will lead the soldiers to fight the Qalagons.

This was the original plan but what will happen if an unlikely romance sparked between the two? Will Commander Iria be able to follow the original plan?

Rivalry of the two Kingdoms

Palace Politics

Palace Romance

Friendship and Betrayal

In the 21st century, she was the talented leader of the hidden family clan, once she crossed over, she became the number one waste?