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Hyunseong, Jeongmin, and Donghyun demonstrated how they cool off during the hot summer season. Donghyun drank ice water, Jeongmin used a fan, and Hyunseong lifted up his shirt once again because let's face it, fans can never get sick of his abs! The boys portrayed a 'SUMMER BOYFRIEND' concept with their different hair color that brought out their eyes.

Check out Boyfriend's pictorial and interview in '10+Star's August issue on June 25!