Xiennah, You will be the only person that I will love in every lifetime. - Yamato. Yamato always write a letter to Xiennah, his late wife who died. Every memories, every places, and everything that reminds him of her, the notes on his phone got it all covered. Natsukashii is a story of someone who is on the process of letting go and moving on hence natsukashii on japan means indicating joy and appreciation of the past rather than a desire to return from it. Letting go while thanking the person is never easy, most especially when it is someone whom you truly love. Will Yamato be able to let Xiennah go? or not?