along with Rachel Trachtenburg since 2009, met Faber and Kivlen at an early Sunflower Bean show; she agreed to join the band as bassist in August 2013, as Supercute!

After a successful series of performances at South by Southwest 2015, the band was signed to Fat Possum Records, and an inaugural 7" single ("I Hear Voices" b/w "The Stalker") was released on July 24.

On November 12, 2015, they premiered the single "Wall Watcher" on The Fader, announcing also the cover art, release date and track list of their first album, Human Ceremony.

[14] The album was recorded at Thump Studios in Greenpoint, Brooklyn in eleven days - produced by Matthew Molnar (formerly of the band Friends) and engineered by Jarvis Taveniere.

The Fader wrote that Human Ceremony's "sounds are retro, but the lyrics grapple with the loneliness of contemporary existence"; Faber opined to the magazine that the album was “about the weight of being alive,”, while Kivlen wondered how alien civilizations would grapple with seemingly incomprehensible present-day human behaviors on Earth: “If there was an alien text book, there would be a picture, and the alien-language caption would just say, like, 'Human Ceremony'.

"[15] Billboard (magazine)'s Joe Lynch wrote "Even though no one in Sunflower Bean is of legal drinking age, the Brooklyn indie trio's Human Ceremony is one of the most fully realized, sonically eclectic debut albums (everything from psych pop to stoner metal gets touched upon) in a minute".

The acts include Beach Fossils, Black Sabbath, The Byrds, Captured Tracks, The Cure, Devo, DIIV, Fleetwood Mac, Glam Rock, Led Zeppelin, Connan Mockasin, The Modern Lovers, Neu!, Nirvana, Pink Floyd, The Ramones, The Rolling Stones, Sex Pistols, The Smiths, Spacemen 3/Spiritualized, Sun Kil Moon, Talking Heads, Tame Impala, Tonstartssbandht, Total Slacker, T. Rex, The Velvet Underground, Unknown Mortal Orchestra, The Who, and Brian Wilson.