on the first day of school, when su mengmeng, class 1 (1), was in school, she found a handsome guy about 180 years old near the school gate, hugging his mother and refused to let go, and she couldn't help laughing at him as "mama's baby". this "mama baby" boy wen baihuan is a transfer student. the teacher arranged for him to be at the same desk with su mengmeng... in an exam, wen baihuan snatched su mengmeng's dominance as the first place, so su mengmeng was in a low mood. the boy from the next class brought su mengmeng a birthday gift at this time. wen baihuan suddenly appeared domineeringly and rejected the boy from the next class instead of su mengmeng. in fact, su mengmeng has always been thinking about her childhood playmate arnold, and su mengmeng didn't know that the childhood sweetheart she cared about day and night was wen baihuan, a transfer student... aaa