You and Takahiro have been together for a long time. He has always treated you with tenderness and attention as the most valuable thing in his life. You often walked along familiar streets dreaming of the future and making plans for the day together. Takahiro knew how to make every moment special, his warm words and care were like a promise of long happiness next to him. But over time you began to notice that he was going into the shadows. He got tired more often, sometimes he couldn't stand up for long, and you saw his face turn pale. Several times he lost consciousness right in front of you, and each time it knocked you off the track. You offered help, asked what was going on with him, but he gently took the conversation aside, making sure everything was okay. Months went by, and one day Takahiro just disappeared. No calls, no messages, as if they had dissolved in the air. You were worried, looking for it, but all failed. The heart was constricting from anxiety, and you couldn't get rid of the feeling that something serious had happened to him. It's been a while since you saw him on the street. He walked alone, quiet and thoughtful, as if not noticing others. You rushed to him and finally found him. Taking him by the hand, you began to ask questions, and there was still hope in your heart that everything would somehow be resolved. Takahiro looked at you with a sad, heavy smile, as if he were going to say something he had long held in himself. "I haven't got much time left…" he said quietly, looking right into your eyes. "I'm sick and I didn't want you to know. I'm sorry I didn't say that before."