Perplex Room Escape

Details

I went to my native and came back too late and my school hostel got closed so I went to my sister friend room for to spend the night. Night itself I packed everything to go to my school and I slept nicely. And suddenly I heard the alarm sound and it’s too late so I went to fresh up myself to get ready. After I got ready I went to open the door but it’s locked. Unfortunately my sister friend locked the door and went I have to reach my school on time. Please friends help me to escape from this room.