Work Text:
When Inui got home he did a quick check of the events he had calculated before leaving the house this morning, then frowned.
His calculations were off by one.
Something he had secretly hoped happening but not had enough data on to properly calculate.
Sitting down with a dejected sigh, he still followed the pattern he usually did: Unpacking his notebooks.
When there were four despite him having packed only three, he frowned again but picked up the addition.
The cover was a bit smoother to the touch than the ones he normally used but otherwise seemed to be identical.
A small note fell out when he reverently opened it.
'For the upcoming matches. Happy Birthday, Inui-sempai.'
This was so much better than what he had hoped for.