While such mature content has become a hallmark of HBO, adding teen characters to the mix has provoked criticism.

Inside the energetic Crossroads restaurant on Melrose Avenue, Zendaya and her co-star, Hunter Schafer, are deep in discussion about the need for a dark, uncensored exploration on teen life – an antidote to the glossier version typically pushed on television.

“This show is in no way to tell people what the right thing to do is,” Zendaya, 22, says. “This is not ‘The Moral Message Show’. This is to inspire compassion among people for other human beings and to understand that everyone has a story you don’t know about, a battle that they’re fighting that you don’t understand. I don’t find the show shocking, but there will be people who do.”

“But I also think that’s what being a teenager is,” Schafer, 20, adds. “Finding the middle ground between being an adult and being a kid and that transition. I think that’s one of the hardest parts, [it] is finding yourself in adult situations but not knowing how to navigate them. And that makes people uncomfortable – because it is uncomfortable. So, yeah, it’s not easy to watch, but to some degree, everyone will be able to relate to it because everyone has experienced what that’s like on some level.”

Based on the Israeli series of the same name, Euphoria was adapted for HBO by Sam Levinson (the son of filmmaker Barry Levinson) and counts rapper Drake – a graduate of the more wholesome teen series Degrassi: The Next Generation – as an executive producer.

Levinson, 34, pulled from his own troubled youth and battle with anxiety, depression, and addiction to opiates in creating the series.

“I think people like to kind of put their head in the sand when it comes to some of these conversations,” Levinson says in a telephone interview.

“And there’s such a generational disconnect. It’s not like 30 years ago, when one generation could provide at least a bit of a road map for the next generation. Life now moves at such a fast speed. I think we’re all adapting at the same time, so it’s difficult to give any kind of real advice to the younger generation about how to navigate the world.”

While Euphoria features an ensemble of teen characters, it centres on the intimacy that develops between Rue and Jules, who become each other’s confidants and advocates amid the pressures of adolescence.

The series is full of hefty material for Zendaya and Schafer to dig into: Zendaya’s Rue is a high school student fresh off an unsuccessful stint in rehab who can’t stop her destructive compulsions – “I know you’re not allowed to say it, but drugs are kinda cool,” Rue confesses while riding a high.

Schafer’s Jules is a trans girl who recently moved into town and is battling her own demons, including a habit of spending her nights having sex with closeted older men and a harrowing past of self-harm.

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“I think Rue and Jules are soul mates,” Zendaya says. “Whether that’s healthy is questionable. But I think that at a point in time, there’s a connection that nobody else will be able to understand but them and they’ll always have it. … There’s a lot of beauty in it, but there’s also a lot of toxicity. They’re both leaning on each other in a way and finding comfort or safety … or a bit of a new addiction within each other.”

“They become each other’s alternative to the toxic elements in their lives” is how Schafer describes the relationship between the characters.

Stepping into the roles was its own coming-of-age tightrope for the young actresses.

A Disney Channel darling since the age of 13 in 2010’s Shake It Up, Zendaya (whose last name is Coleman) was facing a transition in her career. During breaks from her subsequent Disney gig, K.C. Undercover, she built a list of credits that took her beyond the bounds of Mickey Mouse.

She appeared in 2017’s Spider-Man: Homecoming as Peter Parker’s love interest, MJ – a part she’ll reprise in the forthcoming sequel Spider-Man: Far From Home. She also starred in 2017’s big-screen musical The Greatest Showman . But plotting her post-Disney career after K.C. Undercover came to an end in early 2018 proved daunting.

“It’s very hard to go from what feels like junior school and feels like the same grade over and over and over again to finally being able to go to college and then having to go back to the same grade [at school],” she says. “It was just tough. I’m not saying it made me sad or anything. But it didn’t feel great.

“And after [K.C.] was done, it was weird because I’ve had a consistent job, or that kind of schedule, since I was, like, 13. So then to face the fact that I didn’t have that any more was a little weird. And all the scripts I was getting just did not feel right to me because they were with the pretence of what I’d done already, still in that world. Nothing fit. Nothing worked.”

For Schafer, Euphoria marks her first television series. Born in North Carolina, Schafer had been working in New York as a model for fashion heavy-hitters like Dior and Marc Jacobs. She was set to go to fashion design school when she saw a casting call on Instagram seeking a trans actress for the series.

“I was a little scared about being trans and falling into an archetype,” she says. “But after getting a few scripts, it started to make more sense to me and started to resonate even more.”

Beyond the shocking nature of the series, the two hope Euphoria provides a sobering window into the anxiety and stress facing young people today. There have been a number of studies that assert Gen Z to be the most stressed and depressed generation.

“I think a lot of people don’t understand how intense and complicated it is to be a teenager today,” Schafer says. “I think a lot of parents see their kids on their phones and think they’re a … zombie. That is an entirely alternate reality that they are immersed in in that moment that is probably way more complicated and fast-paced than [parents] even realise.”

“Even I don’t fully get it,” Zendaya says. “But I understand a good per cent of it. Rue says in the first episode something like, ‘We just showed up here without a map or compass.’ And it’s true, because we don’t know what … we’re doing. Nobody actually knows what they’re doing.

“Imagine growing up in social media and being a child. It’s not easy. It’s confusing. And it’s uncomfortable. It’s a lot of things. It’s created by the very people that call us the zombies or whatever. It’s like, we’re the by-product of this … you know?”