Like Two Peas in a Pod (manga)

It began with a mistake. When Tanaka and Nakata are given each other's papers back, they come to a horrible realization...

They have almost identical names. And test results. And body types. And taste in fashion. And sports scores. And hobbies. The list goes on, and as annoying as it is, at least they know they always have each other.

And maybe, just maybe, their similarities run even deeper.