C19 The Letter of Challenge

When Mu Niannian entered the kitchen, Mu Linbai clenched his fists tightly. His mommy's forehead had clearly been injured, and it had turned red.

Mu Xiaobai had just woken up when he saw Mu Linbai sitting in front of him, fiddling with the notebook. His small body seemed to be covered by a shadow.

Mu Xiaobai immediately shrank back. An elder brother like this must be abnormal again