Has a similar feel as it is written by Taeko Asano who wrote the screenplay for Last Friends. Deals with darker aspects of love. Opening is also sung by Utada Hikaru. If you liked one you'll probably enjoy the other.

Akunin and Ikari have a sort of slow and sprawling dark narrative that feels quite similar. Both with an emphasis on human nature and paying close attention to the cinematography and music. If you like the one, you'll probably like the other.

Tsumabuki Satoshi is in both of these as well.

Glass no le and Unmei ni, Nita Koi have a very similar feel to them. Both featuring Saito Takumi as the main male lead with mature and realistic romances.

Both Dramas are set on an island. They have a similar feel as well. If you enjoyed one, you'll probably enjoy the other.