Perfect Propose: Bangai-hen

Hirokuni and Kai are still living together now that they're dating. However, they end up spending their first New Year’s Eve apart. Hirokuni notices something off about Kai, who has been visiting his former boss' family. It seems like he's expected to take over the restaurant...?
(Source: Kaiohsha, translated)
Note: A special one shot released in GUSH's Februrary 2024 issue to commemorate the work's live-action TV drama.