Three of Us

Both stories are about people trying nonmonogamy and working through their issues. They have similar endings as well where

SPOILERS they end up not satisfied with nonmonogamy but some of the relationship still survives even after changing.

Both are indie productions featuring throuples. While in Between Complete and Incomplete, theyre an established throuple considering moving in with each other, Three of Us instead gets a look at a throuple from beginning to end.

This suspense story centers on Kajin Ayame, a lawyer with a promising future but who lives alone. The story begins when a beautiful and seductive man, Minamoto Ieya, appears before her. He believes that "love = possession" and is suspected of domestic violence against his wife, and is under suspicion of murdering a professor at a famous university. The two are instinctively drawn to each other after the incident, and Ayame works hard to prove Toya's innocence.