"Don't you want me like I want you?". started: 09/11/19 ended: ??/??/??

Where Soobin is hired to decipher encrypted German messages in WWII , and Yeonjun is a Lieutenant in the Royal Navy.... and Soobin's boss. "We went down the waterfall together. And I know the stream doesn't end after one waterfall, it's ever flowing. People experience dozens or hundreds of crashes in their lives of all different magnitudes..." "I haven't felt like I've been in that pool of peace and tranquility for years... But right now, I feel like I finally am. And you're there with me."