There's still the summer heat that makes us lose our energy! Following the "Haebu-Haebu" soup last time, the second summer special episode for the members' health is here! Health check-up time with a doctor of Korean medicine! Before doing a full-scale check-up, let's measure the age of their body first! NU'EST, who has been super busy lately, how old are their bodies now? And the treatment time that only hurt(?) Ren, who was trying to get along with the doctor!