The Hated Fake Young Master of a Wealthy Family

My dad brought home a handsome guy who seemed about my age.

I looked him up and down and asked my dad if he'd brought him home to set me up on a date.

My dad slapped me and told me I was the fake one, and that the other guy was his biological son.

Older brother/second brother/real young master/classmate gong x fake young master shou

Note:

First-person narration, everyone loves the protagonist, not a one-on-one romance, a little melodramatic and bittersweet. All the gongs are sexually inexperienced.

Extremely intense male rivalry and hair-pulling. Extremely intense! Extremely intense!

Theme: Throw yourself against a wall for the fake young master.