On March 2, BTOB's Sungjae uploaded a video onto his official Twitter that showed a photo slideshow of the group's fans in Cambodia taking part in a rice donation project for 'Lighten Up Smile With BTOB Cambodia.'

Last year, BTOB had visited Cambodia to play with children for an entire day, also donating food and doing other services.  Afterwards, BTOB's Cambodian fans started a project called 'Lighten Up Smile With BTOB Cambodia' in order to expand on BTOB's kind services. 

To celebrate the boys' "Beep Beep" promotions, BTOB fans donated rice in the group's name in Cambodia and even went out to personally give out the rice.  The video shows the happy faces of the recipients as they smile brightly at the camera while holding rice bags.  

Sungjae, who uploaded the video, also wrote on Twitter, "While surfing the internet, I discovered this...They did such kind acts under our name where no one could see them...I'm really grateful.  I was feeling tired both physically and emotionally at this moment, but regained a lot of strength after seeing this video ??!  I love you all, Melody (fan name)?"

Member Ilhoon also wrote, "We BTOB will gain strength from seeing such an example as this.  I love you, Melody!  Thank you, Melody!"

Check out the sweet video above.

SEE ALSO: BTOB share their day in 'Please Stay' MV