[He only hesitates for a moment. He doesn't want for them to get hurt. Just the thought of it makes him sick... Nen probably feels the same way. Neither of them will be able to focus if the other is putting themselves in danger.]

... I will. I wasn't planning to leave you. [Yuuto kisses their forehead before lowering his hand.] If I get hurt, I can fall back while I recover? Is that fair? I usually fight alone, so.... [he's not sure what he's doing.]