Dearest Kaneki-kun,
I really don't know when you're going to see this, but that's okay. I just wanted you to know that I love you a ton. I know that I'm not the best friend someone could ask for, and I know that life is really shitty 90% of the time. But what I also know is that it's people like you and me who keep going. We endure. We are the everlasting.
I really don't know what I would do without you. You've been my savior in so many ways, and I don't know how I'll ever repay you or thank you enough for that. You never fail to make me smile, and you always remind me what it is to be a best friend. You remind me that souls are precious. You remind me what is is to care for someone else.
Can I be honest? I worry about you, best friend. I worry about all of my friends and family, to be honest. With you it's a worry that life isn't going to give you what you deserve. You've done nothing but be an amazing friend, and life for some reason hasn't seen that yet. Whatever the reason I do know it gets better. That seems impossible, but it does. Trust me. I've been through hell and back. What I've found to help is friends, and I know I may not be much, but you've got me.
I promised you once that no matter what we'd stay together. You promised me that too. I don't go back on my word, and I know you don't either. Always remember our promise? I'll get a matching tattoo with you if I need to if it means you won't forget. I'll get it with your name and maybe some cheesy heart or something. Maybe I'll just get your face tattooed on my back.
If I could I would keep you with me always, and I would take care of you. I would promise you rainbows and sunshine as I fed you more food than you could possibly eat. We would watch dumb indie movies and play music... I would give you the world if I could.
This whole letter is probably a jumbled mess of thoughts, and I'm sorry for that. I'm sorry that I lack your way of painting vivid images with words. I'm sorry that instead you get lame-ass Kim Taehyung leaving you messages in your drafts.
I love you, Kaneki. You're the best friend a phoenix could ask for, and I promise for as long as my immortal soul lives I'll be your best friend. And even though I won't remember this life when I'm in my next, I promise to come back to you and befriend you all over again.
-Tiger hyung
P.S. I owe you a mixtape.