Both BTOB and A Pink attended the '2016 MBC Korean Music Festival', which took place on December 31 and went over into January 1. News outlets and fans noticed some time after the event, that BTOB had offered A Pink their coats so that the girls could use them as covers for their laps.
You can see BTOB performing with their coats on during their stage, then without them during a shot of them in the artists section, since their coats are warming A Pink's laps, in the photos below!
Netizens commented, "Heol, so commendable...", "BTOB, for whom we'll ache for until we die (heart)", "Kya may these two teams' friendship last forever!", "I want a male friend like that... This is making my chest flutter...", and more!
BTOB are so sweet and kind!