pospik · OP · 1 points ·
Thank you all for tips. Resolution - it's not "Ladybug" or "Colorado potato beetle" (Leptinotarsa decemlineata), but some kind of "brown marmorated stink bug" (Halyomorpha halys). Nice picture from wikipedia:

pospik · OP · 2 points ·
I am afraid it can be https://en.wikipedia.org/wiki/Brown_marmorated_stink_bug

Look at it's hatched eggs - it looks very similar (in czech mutation of wikipedia there's this picture: https://cs.wikipedia.org/wiki/Kn%C4%9B%C5%BEice_mramorovan%C3%A1#/media/Soubor:Halyomorpha_Halys.jpg )

pospik · OP · 1 points · *
AetherBorn and Maximus7 - are you sure it's lady bug eggs&larvaes? Can it be "Colorado bug"? Or Caterpillar?

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End reached.
:(