Toco the cat definitely shares a special bond with his baby brother, Koshiro. When Koshiro naps, Toco is there, and when Toco naps, Koshiro is there. It may not sound that deep at first, but the two have a schedule that revolves around each other like clockwork.

It seems that from day one, Toco took a budding interest in Koshiro, even if another cat named Momo took a while to get used to the curious baby. Their Instagram account chronicles their lovely first meeting and all the mischief and cuddling (ok, it's mostly cuddling) they get into together. Toco spreads the love around with Koshiro's family and friends as well.

Pretty easy to be best friends when the cat picks you out!

Koshiro is mine now, sorry.

It's written that Koshiro's face was quite sweaty after this!

Moving to a futon didn't change the situation.

And when Koshiro was placed in Toco's bed? Perfect fit!

They grew together, but couldn't give up the synchronized sleeping.

It's not all sleeping, though.

Garbage day!

My turn to sleep.

But maybe after all, together is best.