In "First Day of School ni Sky bilang Grade 1" from Sir Geybin's vlog, Sky experiences her first day of Grade 1 filled with excitement and nerves. Encouraged by her parents, she arrives at school and meets her friendly teacher and classmates. Throughout the day, she participates in fun activities, makes a new friend named Mia, and enjoys lunchtime with her. As the day progresses, Sky grows more comfortable and confident. By the end, she feels proud and looks forward to returning, excited about the adventures that await. The story emphasizes friendship, overcoming fears, and the joy of new beginnings.