I Stayed At Home For A Century, When I Emerged I Was Invincible - Chapter 81 - Save Me, My Father Has Gone Mad

Kanzaki Ryoma transmigrated into the world of Tokyo Ghoul and began fusing with Uchiha Madara. Determined to bring an end to this twisted world, he chose to implement the “Eye of the Moon Plan” and ultimately activated the Infinite Tsukuyomi!

An ordinary student, a wretched peeper, a cowardly teenager with a kind heart. In a terrorist attack, he inherited the knowledge of countless elites, embarked on a path of God Jagged Tu…

He is an artist!

He is a mathematician!

He is a psychology Doctor!

He is a master of fighting!

In fact, he is a man

Taken off raw site:

A wretched, dirty young man is working during the summer when he was caught up in a mysterious explosion. After that explosion, the young man is then left with the memories and knowledge of dozens of the world’s experts.

He has changed, his heart has become cold, iron-blooded. He became a killing machine, his mind turned mechanical, calculative. Everything goes according to his plans and calculations!

In this magical, slaughterous world, a door is opened for him…

- Description from Novelupdates

The Crown Prince of the Capital brought a woman back home, hiding her from sight and pampering her to the skies. Rumor has it she's just a bumpkin from the countryside, pretty but utterly useless.Capital city buzzes: Just a vase rising through beauty alone.When the college entrance examination results are released, why is the name of the national top scorer that very 'vase'?At the gathering for the Association of Painters' new apprentices, why is she standing next to the Chairman?...As various disguises are unveiled, everyone is silenced, wishing they could hide. Who the hell said she was just a vase? Stand up!A certain lady, bullied, covers her hands and cries in pain.Lord Chen comforts her: My lovely wife is so beautiful and moving, why would you bully her?People, with anger they dare not express, cover their faces.Please make it clear, who is the one being bullied!

A 29 year old civil employment exam student wakes up in a blank white room and meets a baby angel. This baby angel informs him that he died in his sleep due to heart disease like his father and grandfather. Remembering his mom and their last conversation he says that he will take on a series of life and death tests that the baby angel offers him. From this point on he must put his life on the line and fight in the stage called ‘Arena’. And Every time he clears a test he will gain abilities and weapons to increase his strength. All to clear the tests and get his life back. This is his story of his fights in the ‘Arena’.