I’ve been think a lot about this BL novel, where the gong is the transmigrator, its a world hopping novel. The shou is the mc but the gong is the who transmigrate, basically the shou forgets the memories while the gong do his missions. The first arc(?) is where the child shou encounter the homeless child ML and gave him food(?), later they adopted him and the Ml becomes the shou’s brother.