After My Childhood Friend Moved In, the Campus Beauty Finally Panicked!

[No rebirth] + [No System] + [Everyday romance] + [Fictional world] [Everyday life, not a power fantasy. Slow pace!!! Read with care if that's not your thing!] With senior year of high school approaching, Lin Chen finally decides to give up on his long-held pursuit of the school beauty, Yun Shiyao. He never expected, though, that on his way home after clearing his head with his best friend, he would run into his neighbor's little sister, Shen Ningchu, whom he hadn't seen in six years. And then... “Brother Lin Chen, can Ningchu marry you?” From then on, the childhood friends who had grown up together began living under the same roof, at least for a while. And from that moment on, Lin Chen, whose parents had died when he was fifteen and whose household register listed no one but himself, finally met the girl who loved him most in the world~ A girl with the body of someone eighteen or nineteen, but the heart of a child of eight or nine~ Before long! The two childhood friends started school together, just in time to catch the last train of high school. Later... Looking at the name ranked first on the results sheet, Lin Chen was stunned. “Kiddo, I think you came first in the mock exam...” “Mm-hm, it's all thanks to you, Brother Lin Chen~” Later still: Watching the girl effortlessly read an instruction manual written entirely in Japanese, he asked, “Kiddo, you know Japanese too?” “Mm-hm, I know a little, Brother Lin Chen~” And finally... The girl who seemed to fall from the sky caused a huge stir at No. 1 High School and in Lin Chen's life... And as the girl helped Lin Chen go from a good-for-nothing to someone who steadily surpassed her, the school beauty's world finally came crashing down...