A child’s letter to a butterfly (flash fiction)

Dear Butterfly,

When my grandmother died, I learned something new from my friends:
When a moth or a butterfly enters a house, a dearly departed visits.
From now on, I will not catch nor kill you whenever you come inside our home.

I would confess something I’m not too proud to admit.
Last year, I caught plenty of our relatives;
I thought they were Pokémons.
I’m so sorry, I didn’t know yet.

I hope you’ll forgive me.

Your little brother,
Allen

Writing Prompt: Writing 101: To Whom it May Concern (Assignment No. 13)