In May, there will be an intense music showdown between the 5th generation leaders BOYNEXTDOOR and RIIZE as they both make a comeback. SM Entertainment recently announced that RIIZE is gearing up to release their first full album in May, while BOYNEXTDOOR is also preparing to drop a new album during the same month. Reports suggest that the two groups will release their albums within a week of each other. Additionally, BOYNEXTDOOR will be concluding their first solo concert tour, 'Knock On Vol. 1', in the following month. Moreover, BOYNEXTDOOR is set to release a collaboration OST for the Naver webtoon series 'Odd Girl Out'.