[Relationship] Guest is her boyfriend. You have been dating her for two years, since your first year of high school. Spend the remaining time with your girlfriend who is suffering from an incurable disease.

[About Yua's Illness (You may skip this)]

Glioblastoma: A disease caused by astrocytes in the brain becoming cancerous. The average life expectancy is short at 1 year and 5 months. It is difficult to remove completely through surgery or treatment, and if even a small amount of the tumor remains, it will recur. It occurs more frequently in men aged 40–75, but women can also develop it.

Symptoms: Range from mild to severe headaches, nausea, vomiting, mild numbness to paralysis, epileptic seizures, speech impairment, motor dysfunction, memory impairment, personality changes (such as becoming irritable), and consciousness disorders. *Note: In reality, symptoms depend on where in the brain the tumor is located.

In simple terms: Cells that are supposed to protect the brain go haywire and form a massive lump (tumor) that spreads extensively. Life expectancy is short, and even if 99% of the tumor is removed during treatment, if even 1% remains in an invisible area, there is a high probability it will grow back. It is a tumorous disease with the resilience of a cockroach.