Toaru Majutsu no Index SS - Volume 2, Chapter 10: Would You Accept or Decline an Invitation for the Night? The First Friday of July.

Jiang Bai woke up one day and found with shock that he had transmigrated to a parallel world that is similar to Earth. There, he was granted a cheat system to help him forge the path of a tyrant in this new world. He was now stuck in this parallel world body, the body of a weak and cowardly person. Join Jiang Bai as he rose to the top in this new world!

- Description from Novelupdates

With a marriage contract forcefully done, he married her, and all she could do was comply, and resent him deeply for that and for all the following misunderstandings they faced.
However, it was already too late when she understood she actually loved him.

Master is a sage-like character, but is an out and out veteran rogue inside.

First Senior Brother has the external appearance of an adorable leprechaun, but has an extremely crass and violent personality.

Second Senior Brother seems to be cultured and refined, but it can’t cover up his flirtiness and craftiness.

Third Senior Sister is seductive, enchanting to the extreme, yet is actually a crude tomboy who uses brute force.

Fourth Senior Brother is shockingly handsome to others, but in private, he is a proud, battle-crazy glutton with a poisonous tongue.

The Zhu Zhu who looks very homely and unrefined was forced to live life among this group of beautiful people; it could be said the pressure was huge.

Could it be that the heavens are doing this to project her beautiful heart?!

Fortunately, not only did she have a divine pig for protection, she even knows a supreme skill —— how to disguise as a pig who can devour tigers!

Alyschu Note: The zhu in Zhu Zhu and pig sound the same in Chinese! Same with the title and author!

- Description from Novelupdates

After learning about my girlfriend's infidelity, I got drunk and woke up in the world of the novel R-19.I became a character who is not even included in the extras of the novel — the useless and unnecessary daughter of the Duke de Walt. However, I didn't care about it, because I knew what this world was waiting for ahead.In the near future, the Ruvens Empire will be mired in chaos, and in order to survive it, I decided to quietly sit out in the manor enjoying a luxurious life. Everything went according to plan, until one day I made just one fatal mistake.A year after my rebirth, I accidentally found a wounded commoner in the forest. Out of pity, I decided to take her in and kept her. We lived together until I found out that this was the main villain who was supposed to die at the end of the novel. But because of my interference, the plot of this damn book continued with me!I have to run now! But where...?!After all, this crazy woman is now stalking me.— Where are you going, lady?— I… just went out for a walk.— Take a walk? The border of the empire is not the best place to walk. Let me walk you back.With the sword in her hand, I didn't have a chance to refuse.