C351

When Mu Tianhao entered the study. Mu Liufeng was walking beside a bookshelf. He casually looked at the shelves full of books.

"Sis." Mu Tianhao called out. He then found a place to sit down.

Mu Liufeng turned around. Mu Tianhao was the only one to come in. He didn't find it strange either. However, he still asked mockingly