he's not debuting this month
he's just finishing filming of his drama Goong S, and he's gonna prepare for his concert in April, and directly after that he's gonna fly to the US and shoot the music video for his US single.
Then he'll go back to Japan for June-July, to promote a new single as well as a new japanese concert tour.
Expect Se7en to successfully debut around august-december this year.
Also he'll be featured on Amerie's album when it drops April 28.