Osomatsu-san - Episode 3.5 [ENG][BD][1080p].mkv

3.5 (OVA) "Matsu Juice"
"Matsu Jiru" (松汁) January 29, 2016[5]
"Virgin Heroes"
"Dōtei na Hīrō" (童貞なヒーロー)

The Idol Matsunos participate in various activities that serve no purpose other than to promote a dubious health product. Meanwhile, the actual brothers become Sentai heroes to help Choromatsu, only to find themselves helpess at the sight of a social barbecue.

from Wikipedia