Shinyuu Inai no Dare?

What's the difference between a friend and a best friend?

In the workplace, at school, around the neighborhood. I had friends everywhere, but... My best friend, who I met again for the first time in 4 years, was cradling a child in her arms. Pregnancy and childbirth... She's supposed to be my best friend, so I can't believe she didn't report such important life events to me...

Do you have anyone you can call your best friend now?

(Source: Shueisha, translated)