Dear, Sunshine. Thank you for being here, for coming to us, for making sure we're healthy and happy. Thank you for everything you did this whole time, 29 years, and so on. You did great. You always did. I hope you too, always take care of yourself, be healthy and happy. Because, Sunshine, "u smile, I smile." Thank you, I love you.

Happy birthday to our eternal sunshine, Kang Younghyun. May your days always be filled with love and happiness. Thank you for bringing so much joy into my life. 우리 건행하자—건강하고 행복하자!

Happy Birthday, Young K! I hope you have a super good new year again. I hope you can walk as yourself! Thank you for your work over the past year and for your hard work 💗 You always make us proud of everything you do!! See you soon, I will always wait for you! I love you!

thank you so much for all the things you've done for the hardwork you put in, younghyun. you're totally one of the best person i am grateful knowing for and i couldn't grasp that i totally miss you every single time. take care always and i'm thankful as you almost accompany mydays almost all throughout the year! see you again when we see you. i know you'll do well.

For someone whose birthday is on December 19th 🌟 I always pray to God that you will always be given all health and happiness Stay happy, try, and keep the spirit Never stop dreaming and keep working by creating many beautiful works

I don't think I'm best at writing letters but i really want to express how I feel. First of all, I'm so proud of you, I'm so proud of everything you have done and everything you've achieved, I love you and I always will. Thank you for the hard work, thank you for being you, thank you for bringing joy and happiness to my life, thank you for existing. To my favorite person in the whole world, to the one who always gets to cheer me up, to the one who I love the most, Kang Younghyun, Happy Birthday!

Happy birthday my love! It's so lonely the days that i pass without you here. I feel like time is moving slower. :( I just want to say Happy Birthday. Hope you eat a lot, be happy there!!!! I miss you a lot, Young K. Thank you for being born, thank you for being the brightest star, thank you for being the reason I'm still alive in this world. Thank you thank you very much. Stay healthy! I always love you. 💗💗

Wish you the happiest birthday, Love. Even tho this year you're not here & celebrating your birthday with us, I hope you will keep shining and be the eternal sunshine to others. Serve well and please comeback safely! We love you <3