What is this letter about?

First Love

The one you never quite forgot.

My Crush

Say it before the moment passes.

Friendship

Bench partners, forever.

Anniversary

One more year of us.

Birthday

Better than a forwarded sticker.

Missing Someone

Distance, in ink.

I'm Sorry

Some sorries need paper.

Thank You

For everything, quietly.

Proposal

Ask the old-fashioned way.

Long Distance

Miles, folded small.

Just Because

No reason. That's the reason.

Old School Friend

Last bench reunion.

Something Else

Your own reason, your own words.