By Jon ParelesTHE NEW YORK TIMES

A failing romance can spark enduring breakup songs. Consider Taylor Swift, Shakira, Bob Dylan, Beck, Joni Mitchell, Björk, Fleetwood Mac and, now, Omar Apollo, with his second full-length album, “God Said No.”

Apollo, 27, was born and grew up in Indiana, the son of immigrant parents — his given last name is Velasco — who shared their Mexican traditions with him. He emerged on SoundCloud in the late 2010s as an alt-R&B songwriter with echoes of Prince, hip-hop and indie-rock, singing largely in English and occasionally in Spanish. Apollo’s full-length debut album in 2022, “Ivory,” gave him a TikTok-powered, platinum-certified hit: “Evergreen (You Didn’t Deserve Me at All),” a self-questioning ballad with echoes of the 1950s and electronic overtones.

“God Said No,” his latest album, released on June 28, plunges more deeply into the raw, unsettled, often contradictory emotions of a crumbling relationship. Apollo sings about sorrow, regret, doubt and disbelief, along with bitterness, anger and lingering desire. It’s not a clean break with one side to blame; it’s far more complicated.

Teo Halm, one of Apollo’s co-producers on “Evergreen,” is an executive producer (with Apollo) on “God Said No,” which retains and expands that song’s pensive mood. Most of the new album sounds deliberately modest, verging on low-fi. Its tone suggests troubled thoughts and uncomfortable conversations, small-scale and introspective — seemingly private, not overtly theatrical.

One model for “God Said No” is probably Frank Ocean’s 2016 “Blonde,” another heartbreak album awash in vulnerability; Apollo’s reedy tenor often resembles Ocean’s voice. On “God Said No,” the guitars and keyboards are tamped down and reticent; drumbeats are present but not pushy. Even when the production deploys strings, horns or Apollo’s own backup vocal harmonies, they’re subdued and distant, more like apparitions than reinforcements.

The partial exception is “Less of You,” a metronomic synth-pop track that harks back to Giorgio Moroder (along with some Daft Punk-style filtered and harmonized vocals), with Apollo wondering, “Was last night the end of me and you?” Even with a blippy hook and a chorus that shifts into a major key, Apollo sounds increasingly alone and forlorn.

There’s a loose narrative arc to the album. The songs trace a growing friction that leads to an estrangement, to testing new partners and, finally, to what might be either a reconciliation or a fond farewell. In the album’s opener, “Be Careful With Me,” Apollo sings, “I tried to be someone you liked/But it’s just too much compromise,” over acoustic guitar picking that hints at Elliott Smith. A few songs later, he insists — in a chorus that repeats the phrase 16 times — that he’s “Done With You.”

Clearly, he’s not. “I can’t let go, I should let go,” he vacillates in “Drifting.” In “Life’s Unfair,” he admits to having a fling while separated, but insists, “When I was kissing him, I was seeing you” and adds, “I would’ve married you.”

Although Apollo has nodded to Mexican music on past albums and EPs, he has Spanish lyrics in just one song on “God Said No”: “Empty,” an otherworldly waltz placed midway through the album. Its chorus plainly states, “You left me empty/Hollowed and empty.” The second verse switches to Spanish, as Apollo confesses that he can’t stop thinking about his ex, and adds, in Spanish, that he’s “singing in another language so you don’t understand me/I don’t want you to know how much it hurts.” He’s bereft, but trying to stay guarded.

Yet he’s still clinging in “Dispose of Me,” a swaying slow-dance tune that urges, “We got too much history, so don’t just dispose of me.” And in the album’s finale, “Glow,” Apollo sings, “You’re my only one, I can promise that,” over swelling synthesizer arpeggios. Then he pleads, as the arrangement falls away, “Before you leave, give me one more dance.”

The album ends. But the yearning continues.

Omar Apollo: ‘God Said No’ Tour

When: 7 p.m. Oct. 11

Where: Rady Shell at Jacobs Park, 222 Marina Park Way, downtown

Tickets: $45.25-$194

Online: theshell.org