he's going to discover that he can create fire with his body sometime during the weekend so figuring out how not to burn everything down will keep him busy for the first couple of days. he could take her out for a birthday dinner either monday or tuesday that leads to them running into the bad people, and he'll be like "so i have this new trick that might come in handy in a situation like this?" and then from thursday to saturday he'll be stuck in somebody else's body, so good times.