Protect My Sickly Beautiful Little Childhood Friend!

[Main Story Completed] When Luo Enyuan was five years old, he was brought to his new home and met a pair of golden-haired, blue-eyed twin brothers on the staircase. He was terrified. Remembering his friends' boasts, he stammered, trying to bolster his courage: "Hello, brothers, I'm the illegitimate child." The two brothers: "?" "Even if he looks like my doll, I won't forgive him!" The other one stared at Enyuan's delicate, tear-streaked little face and slowly added, "Unless he's willing to be my little sister!" Enyuan, who couldn't understand a word of their foreign language, burst into terrified wails. The two cocky brothers, who only spoke English, were at a complete loss. "Brother...