His Own Humanity
An AU series set in modern-day America (plus magic) featuring characters from Rurouni Kenshin (primarily Saitou and Sano) and Gundam Wing (primarily Heero, Duo, Trowa, and Quatre). In reading order, which is mostly chronological, the stories currently available are:
During Plastic (part 80), Cairo thinks about thinking and other recent changes in his life.
During La Confrérie de la Lune Révéré (parts 33-35), Sano’s 178-day wait is over as what Hajime has been fearing comes to pass.
A few days before the epilogue of La Confrérie de la Lune Révéré, Duo and Sano get together to watch football and discuss relationships and magical experiences; Heero listens in on multiple levels.