Got stuck in my brother's favorate novel

Li Tianshi who was a novel reader got transmigrated into his brother's favorate Mature BL novel named "Dark life" a novel which is about a guy went from being a war slave prince from the shin empire came backe alive and form a rebel army to destroy the Li Empire

"What the........actual f*ck!!!"Li Tianshi.
"Hello this is System 143"
Li Tianshi looked at the rabbit in front of him and said "whaaaa.... (processing)".

"f*ck"Li Tianshi said.

"please refrain from saying such words host"the rabbit said with a smiling face.

"Are you already awake my love~"

A Unknown man said while gropping his butt.

"WHaT ThE FuCK?!!!"

*First time writing*