Mythical Beasts Costume Set
The name of this costume set is 召喚松 Summoning Matsu, which is probably a pun on 召喚獣 Summoning Beast.
Osomatsu:
He’s called a miracle fool and is the summoning beast of gambling. Come out! Ifrit Osomatsu!
Karamatsu:
He makes chuunibyou* worse and is the summoning beast of narcissism. Come out! Shiva Karamatsu!
*Chuunibyou -
behaving in a way characteristic of
teenagers going through puberty, esp. by being overly self-conscious;
“2nd year of junior high sickness”
Choromatsu:
An idol worshipper, summoning beast of wotagei*. Come out! Sylph Choromatsu!
*Wotagei - type of dancing and shouting performed by fans at concerts (usually idol concerts)
Ichimatsu:
He descends from darkness, masochistic cat-loving summoning beast. Come out! Fenrir Ichimatsu!
Jyushimatsu:
He’s extremely bizarre, the summoning beast of unconventionality (muscle!). Come out! Gryffon Jyushimatsu!
Todomatsu:
The stories of his ability to get on in the world will be passed on, the summoning beast of girly power! Come out! Unicorn Todomatsu!
So that’s why there is no such thing as blue roses.
Because this guy made them go extinct.
What is he cooking?
Matsuno brothers summoning Totoko!
He’s singing them lullabies I’m crying
Please don’t hurt yourself


