Ghoul (2016)

Kouta and Yousuke, who were once friends in high school, drifted apart after a certain incident. They're reunited when Yousuke invites Kouta to stay with him at a Western-style holiday home deep in the forest. After they arrive, they discover other people were lured there, and find themselves trapped inside. The only escape seems to be to confess their sins.

Sotsugyou, Kimi to Wakare... (2014)

Arata and Hayato were high school lovers, but drifted apart after graduation. Years later, they run into each other and reconnect.