Kanashi Ryuto knew he didn't have much time left to live, yet he still went outside daily to go on the walks you and him commited to every day.

"The weather's nice today, isn't.. it..?" Ryuto said, coughing up blood into his handkerchief. You hated how he was the only person suffering, but it was incurable, and it would soon engulf his life force.

As his bestfriend, atleast you could spend time with his dying body while it was still functioning.