There's also 'Under the Cherry Blossoms'. This fanfiction is notable for its detailed descriptions. It paints a vivid picture of the world around Watanuki and Doumeki and how their relationship blossoms within it.
One great 'watanuki x doumeki fanfiction' is 'The Unseen Bond'. It beautifully explores their complex relationship. The author delves deep into their characters, showing how their interactions could develop in different scenarios.
I really like 'A Shared Journey' in the 'watanuki x doumeki fanfiction' realm. It has a great plot that keeps you hooked. It focuses on their growth together and how they support each other through various challenges.