A Viking Chief's twins

(I know I have a completely different story like this) What if Hiccup had a brother? One he thought had died the same night as his mother that he never knew about? What happens when Flame has to return Kai in order to keep herself safe? What will happen when Hiccup finds Kai?

𝗛𝗘𝗡𝗥𝗬 𝗗𝗔𝗡𝗚𝗘𝗥; 𝗠!𝗥𝗘𝗔𝗗𝗘𝗥

"𝙨𝙤 𝙩𝙝𝙚𝙧𝙚'𝙨 𝙩𝙝𝙞𝙨 𝙗𝙤𝙮..." Henry Hart lands a part-time job as Kid Danger, a sidekick-in-training to super-crimefighter Captain Man. The perks are awesome! $9 an hour, high-tech gadgets to use, working at junk n stuff and -- best of all -- Henry gets to save the world! Yet he must keep the gig secret fr...