Senior Brother, Don't Run! Your Crazy Junior Brother Is Pretending to Be Weak Again

[Two Male Leads, 1v1 | Transmigrate Into a Book | Unhinged | Forced Imprisonment | Cultivation and Renegade Immortal Comeback | Revenge and Putting Scumbags in Their Place]

Brooding, unhinged junior brother who pretends to be weak (gong) VS carefree, refined, charming senior brother (shou)

The junior brother is unhinged and fiercely protective. The senior brother becomes seriously formidable later on.

"Senior Brother, it's been a hundred years. I've missed you!"

A young man in white lay draped over the edge of the coffin, gazing at him with longing.

Tang Zhongjin accidentally transmigrated into a book and became the good-for-nothing cannon-fodder senior brother he'd written himself.

From the start, he was trapped in an ice coffin. His mission required him to kill the villain, Lu Chengyuan, within a hundred days, or die.

But as soon as he woke, he was rescued by the villainous junior brother. With his spiritual root destroyed and his nascent soul shattered, Tang Zhongjin became a caged bird from then on.

Every day after that, Tang Zhongjin did nothing but figure out how to kill someone and try to escape.

Wait, can someone tell him why this villain isn't anything like the one in the book?

When savage corpse monsters ran amok, his junior brother unhesitatingly stood in front of him, even using forbidden techniques to save him.

He clung to Tang Zhongjin's waist, looking pitiful. "Senior Brother, don't leave me behind."

As they bathed together, Tang Zhongjin's battered body was exposed. "Senior Brother, from now on, A Yuan will protect you..."

Only when his junior brother lowered his head and bit down on his collarbone did Tang Zhongjin realize things seemed to be getting rather out of hand.

What kind of relationship had these brothers had before?