BTOB completely sell out ‘2017 BTOB Time’ as soon as tickets go on sale BTOB completely sell out 2017 BTOB Time as soon as tickets go on sale. BTOB have completely sold out their 4th solo concert! The boys will be holding 2017 BTOB TIME ~Our Concert~ on December 23 and 24 at the Ilsan KINTEX. Tickets went on sale recently and all 50,000 seats (25,000 per day) sold out immediately, with servers crashing. Congratulations to BTOB!.