MTL - Since 2000 - Chapter 4 : It's a pity not to do this

A mecha otaku is reincarnated into another world as Ernesti Echevalier (Eru). In this world there exist huge humanoid weapons known as Silhouette Knight. Dreaming of piloting those robots, Eru, with childhood friends, Archid Walter and Adeltrud Walter: together they will aim to become a Knight Runner, pilot of Silhoutte Knight.

In the winter of Taikang Year 3, a girl pays a visit to her future in-laws, the Ning Family of Beiliu, Yangcheng.

After her engagement was denied, the girl decided to hang herself in front of the Ning Family to show them her sincerity.

When the girl who had died opened her eyes once more, many people’s fates were changed forever.

- Description from Novelupdates

A handsome man was hit and lost his memory for dangerous driving and saved by Lin Xiaomi. Since the day, the man just hung on in her house and refused to clear out. Also, from that day on, the only goal of Lin Xiaomi was to dislodge him!

The first person that Leng Yihuang saw after losing memory was Lin Xiaomi, who was a full-breasted beauty simple like an innocent child. She fascinated Leng Yihuang like a magnet. Since the day they met, his only thought was to f*ck her!

Of course, the winner is king, the loser needed to warm the bed… But after the night, the bastard just disappeared. Lin Xiaomi swore to God that she would hunt down that as*hole no matter where he was.

But when a bunch of guards with guns showed up and called Lin Xiaomi “Your Ladyship”, she was struck dumb with fear and astonishment. The man who walked out of a Rolls-Royce was just Leng Yihuang, who turned out to be the heir of a big shot…

- Description from Novelupdates

Transmigrating into a world of cultivation, you find yourself at the lowest rung of the sect's hierarchy. Everyone wants to bully you to gain some benefits. Fortunately, there are always a few junior brothers and sisters who are 'generous and understanding', allowing you to improve peacefully and secretly grow stronger. Years later, unbeknownst to anyone, you successfully become a deity within the sect. This day, your master visits you at the sect's request.'The upper echelons of the sect believe you have been diligent and loyal over the years, and though your strength is mediocre, you are an honest person, so they've found a marriage alliance for you.''An alliance marriage?''Not exactly. The other family has a rule: marrying into their family means taking their surname.'Is this... becoming a son-in-law who marries into the wife's family?