Arvin Chen’s second feature, “Will You Still Love Me Tomorrow?,” never gets off the ground as a whimsical romantic comedy, but that shortcoming does serve a higher purpose. Dutifully hitting its marks up to a point, this story of a married man struggling to stay closeted proves to have a maturity that eludes more overtly ambitious dramas on the subject.

An optometrist, Weichung (singer-actor Richie Jen), dotes on his wife and son, but the marriage has meant nine years of self-denial. When he stares into a cute flight attendant’s eyes during a glasses fitting, in a simple and sweet scene, it’s the beginning of a new chapter for him, ready or not, and only a matter of time before his wife, Feng (Mavis Fan), finds out.

In another plotline, Wei­chung’s sister (Kimi Hsia) is fleeing her frumpy fiancé (Stone), but the movie’s lesson about her fickleness pales beside the tacit comment on her blithe sense of entitlement.

The features that might peg the film as a playful romance — little flights of fancy, like a musical sequence and an imaginary sidekick from a TV soap opera, and a lush score — are a little too plainly executed to be buoyant. So is Chen’s screenplay. But even if the movie concludes with a note of reconciliation, it sensibly doesn’t wish away the reality of Weichung’s situation.