Papa no Obento wa Sekai Ichi

They're both about bento and using it to change the parent-child relationship.

-very similar in the fathers make food as a way to get closer to their kids.
-both heart warming and showing how bento connects families.

Both stories are cute and heartwarming stories centered on making bentos.
In both cases, the main leads find themselves out of depth when faced with the unfamiliar challenge of preparing bentos for another person and bonding with them through this process.