I recognize your concern. Indeed it would be a dire situation should I become injured. That being said I am well accustomed to danger.

If it would put your mind at ease I can communicate with you through our devices, and you can have my word that I would return by a certain day.

[The art of compromise! He's observed that Tsuna has been kind and thoughtful expedition leader so it truly would be a shame to cause him a needless headache.]