I thought the same at first, but used to piggy back my friends around alot in school. Holding on with at least one arm really helps the person stay on the back. And usually the carrier uses there arms to wrap under the legs. Yeah you could still hold a suitcase, but it would've been pretty hard especially if it was like a mile walk.
Honestly it would be kind of ridiculous for him to hold the bouquet, did you see how huge it is? Imagine carrying another grown man on your back during a snow storm and they are holding this giant ass bouquet. Also it was a bit of a walk plus heavy wind from the snow so I assume to stay secure both his hands had to be wrapped around so there was no way the dude was going to see where he going with that huge bouquet in his face. I think it’s more ridiculous and hard to believe the way you explained
Flowers weigh almost nothing. Even a bouquet that size is incredibly light.
He can use one arm to hold on and carry the flowers in the other.
He can even hold the bouquet down behind the back of the person carrying him. You know, with his arm down by his side with the stems pointed towards his hip and the flowers sticking out to the side away from him and the person carrying him.
This is a basic spatial and body awareness thing that you should be understanding. If you have ever held flowers or had a piggyback ride you would know this isn't challenging. There's no excuse for it.
Come on. You're all arguing for the sake of arguing. This is just sad. What's wrong with y'all?
I worry about your personal lives. The fact that you can't see a solution for problem this simple really shows how deeply helpless you are.
I know you're going to continue to make a problems like saying that the flowers need to be supported but if you look you'll see the man carrying the flowers is not supporting them. That changes nothing. Also no, that's not true. Plants stems support flowers. You've seen flowers. You've touched flowers. You've held flowers. You know how flowers work!
I understand that this is a test and that the seme is very happy that his husband is incredibly stupid. I get it. I know that's the point... But no one is actually that stupid.

The art is great, and I know the source novel is well regarded, but chapter one threw me off.
The scene with the bouquet and the suitcase just doesn’t make sense. If the goal is to show manipulation, fine, but no one is so helpless they can’t carry a bouquet while riding on someone’s back. You have two free hands. Anyone with the spatial awareness of a 3 year old would instinctively say, “I’ll take the bouquet, you take the suitcase.”
I just cannot suspend my disbelief hard enough.