They recently revealed that they would be holding their second solo concert 'Tentastic Vol.2' from June 10-12. Now, they have uploaded an image of a full moon with the date of May 18 and the caption, "coming soon."
If you can recall, right before they held their first solo concert, Pentagon also hade a comeback with the release of their 2nd mini album 'Five Senses'. Perhaps, they will do the same again? We'll know for sure in a few days!