My Starry Sky
http://www.mangago.me/home/mangatopic/4501162/
Hanayome wa Juunanasai
Two young men find themselves in a compromising situation when their tyrannical mothers set them up for an arranged marriage. Things get really complicated when the bridegroom's older brother falls head over heels for the cross-dressing bride and an unusual love(?) triangle forms.
Keyring Lock
Similar plot to Yamada and the boy
Awairo Emaki
When he was little, Ryuuta was attacked by a youkai. An older boy came to his rescue, he was a wandering youkai exorcist called Izumo. Soon after the incident Izumo departed on his travels again, leaving Ryuuta behind, but promising to come back one day and start their own journey together. Years later they meet again, but Izumo seems to have no recollection of their promise. Nevertheless, Ryuuta is determined to stay with him, and they end up travelling togetherNote: Previously titled Awairo no Hibi.
Sore wa Are da, Ai Kamo ne