AN: For those who didn't understand the "Stomach Pains", the character is Inuyasha's father, and it explains exactly why the Tetsusaiga is found inside his corpse.
Possibilities
Try as he might, Buyo couldn't get outside that morning. The windows were all closed, and no one would open the shoji door keeping him inside. The old abandoned shrine was usually quite toasty in the sun, not to mention dark, but it didn't look like he would get to nap there today.
"Bye mom!" Souta called as he left for school.
Buyo dashed forward – this was his last chance!
Souta closed the door after himself. So much for that.
But wait – Kagome! Buyo's hopes were quickly raised and dashed as Kagome repeated Souta's actions. It didn't look like the lazy cat would ever get to the shrine.
It probably didn't matter.