On the Dec. 28 installment of "Radio Star," BIGBANG's T.O.P revealed co-member Taeyang's kind gesture to encourage him while going through tough times.

According to Allkpop, T.O.P said his co-member sent him a handwritten letter that stated how much Taeyang will miss him while the former will be in Germany to film for two months. "These days, you look more tired and lonely, so I am always worried about you. Cheer up, hyung!" Taeyang wrote.

The idol continued, "Every night, I pray for your soul and for you to one day realize God's love that the Bible talks about. Have a good trip. Hyung, I love you!"

Taeyang said he wrote the letter to comfort the BIGBANG co-member who was then having difficulties. On the other hand, T.O.P admitted he was touched upon reading the handwritten letter from the co-member, Soompi cited.

He added BIGBANG members are usually not expressive of their feelings; hence, he was moved with Taeyang's message, while G-Dragon added T.O.P tends to get emotional too quickly.

"It said at the end, "I love you." It's a phrase that is very hard for men to say to each other, because we're shy about it," T.O.P said.

Not only that Taeyang has written letters to his BIGBANG co-member, but also to his girlfriend Min Hyo Rin. The idol shared he sometimes send them through e-mail or hand them personally alongside a bouquet of flowers.

The recent episode of "Radio Star" moved many fans who never knew Taeyang is a sweet person. Fans commended the BIGBANG member for being adorable and romantic.

Other fans said they hope Taeyang will continue to write letters for T.O.P to cheer him up while serving the mandatory military service starting next year.