Having spent their mid-teens playing music together in other bands, sisters Júlia and Maria Reis formed Pega Monstro in 2010 to focus on crafting their own distinct sound, which they fittingly dubbed "dream-punk." Two years later they released their self-titled debut, a 12-song set of energetic and raucous pop-tinged garage-rock that they further developed on Alfarroba, which followed three years later.

Working once again with producer Leonardo Bindilatti, Casa de Cima represents a significant leap for the band in terms of its sound. Something they cheekily address on opener 'Ó Miguel', its first line translating as "I changed the strings on my guitar." That song begins with a mix of strummed electric and acoustic guitars and what follows is one of the cleaner sounding Pega Monstro albums yet.

'Partir a Loiça', 'Pouca Terra', and 'Cachupa' all burst with the same punkish spirit and energy of their earlier releases. However, everything -- their trademark buzzing guitars in particular -- has been smoothed over in favor of something a little brighter ,with greater emphasis placed on their growing pop sensibilities.

Similar in structure to their previous albums, Casa de Cima balances charged and straight-ahead rockers with slower songs like the hushed 'Fado da Estrela do Ouro', which nearly feels like a lullaby, and the slow march of 'Sensação'. But that's where the similarities begin and end, as they are even more focused this time around, paying greater attention to things like detail and structure - and the results are rewarding.

Album highlight 'Cachupa', for instance, starts off fairly straight-forward but quickly gives way to a blissful and noisy jam that sees them exploding the limits of their dream-punk sound in what amounts to a controlled explosion before a waltz-like time signature winds everything down. The eight-minute closer 'Odemira' aims to pull a similar trick. What starts off as a gleeful rave-up takes less time than 'Cachupa' to reach its climax. Two-minutes in and its a flurry of drum and cymbal crashes, handclaps, tangled chords and harmonies before it quickly settles and gradually winds down then disappears completely. Then, after a few seconds, they launch into a refrain from 'Ó Miguel', tying everything neatly together.

Spanning just 7 songs in a little over 30-minutes, Casa de Cima feels like the most accomplished Pega Monstro records, especially in terms of how they further explore the dreamier and more polished qualities of their dream-punk sound. But regardless of how refined they may sound here, they remind us at the same time that they're still plenty capable of rocking out.