If you like the con men theme, then you might like this drama as well. A group of friends trick and con other criminals...

Both dramas revolve around a group of friends who are using all methods possible in order to battle corruption.

Another story of two couples and one of them starts cheating which leads to their marriage falling apart.

These two dramas are identical in terms of plot - two couples and they cheat on each other. The dramas revolve around infidelity.

There are no two couples in "Ame ga Furu to Kimi wa Yasashii", but both dramas revolve around infidelity.

In both dramas there is an unhappy couple and the husband and wife cheat on each other. The dramas revolve around infidelity.

In both dramas there is an unhappy couple and the husband and wife cheat on each other. The dramas revolve around infidelity.

These two dramas are identical in terms of plot - two couples and they cheat on each other. The dramas revolve around infidelity.

The main female lead purchases a boyfriend in both dramas except in "Zettai Kareshi" the boyfriend is a robot and in this drama he is a real human being :p

Both plots are about an older woman and younger guy who is kinda obedient to her thus called her "pet"...

Both male leads are cross-dressing as women but in the case of Bye Bye Blackbird there's not much romance, it is more of a mystery.

Both male leads are fans of cross-dressing and they look great as women. There's a bit of romance too.