I appreciate your request, but I notice the text you've provided is in Chinese (traditional characters), not Japanese. Here's the translation: Dear, to my most beloved you, However, if you have Japanese text you'd like translated, please feel free to share it, and I'll be happy to translate it for you.

Early spring. A letter arrives from someone who was supposed to be dead—a person I hated due to our twisted connection. A suicide note, perhaps? Words of resentment toward me? Thinking something like that, I opened the letter. But what was written there was neither a suicide note nor resentment. What was written in the letter was a painfully tender love that had been hidden for ten years, and a lifelong request entrusted to "me." A confession that came too late for an achingly pure love. Feelings that went unnoticed and unacknowledged because we were too close. His painfully tender, precious, and fleeting ten years of longing—a bittersweet and warm story written in that letter.