I Give My First Love to You (Boku no hatsukoi wo kimi ni sasagu)
Takuma and Mayu promised to marry at the age of 20. But Takuma is hiding a deadly secret: he won't live long enough to keep that promise. With a broken heart, he walks away to protect Mayu. However, true love is not easily decided. Will they find happiness amidst ever-shrinking time? The final offering or the greatest sacrifice?