The biggest fan theory for XO, Kitty Season 4 involves a brand-new love triangle — and it’s already setting social media ablaze. With Anna Cathcart returning as the endlessly optimistic (and slightly chaotic) Kitty Song Covey, viewers are hoping the next chapter dives deeper into the complicated relationships that began during the KISS drama, forcing Kitty to confront what she really wants beyond the fairytale romance.

After Season 3’s emotional rollercoaster and that heartfelt airport reunion, fans aren’t ready for a simple happily-ever-after. Instead, many are theorizing that a fresh (or revived) love triangle will test Kitty’s growth, her friendships, and her newfound willingness to embrace the unknown.

Where Season 3 Left Us — And Why a New Triangle Feels Inevitable

Season 3 ended on a hopeful, swoony note: after multiple breakups, misunderstandings, and trust issues (including the fake pregnancy drama with Eunice), Kitty and Min Ho (Sang Heon Lee) finally confessed their love, shared a passionate kiss at the train station, and boarded a flight to Portland together for winter break. Kitty’s voiceover emphasized letting go of her need to control everything and simply enjoying the journey.

Yet the finale also left plenty of lingering tension:

Old sparks with Yuri (Gia Kim) flickered again during the surprise 18th birthday party.
Friendships shifted dramatically, with Q and others facing their own crossroads.
The entire crew is approaching the end of their time at KISS, with graduation looming and real-world decisions (college, family expectations, long-distance) on the horizon.

This open-ended feel has fans theorizing that Season 4 won’t just coast on Kitty and Min Ho’s new couple status. Instead, it could introduce (or rekindle) a love triangle that complicates everything — perhaps involving a new character at KISS or back in Portland, or reigniting the Kitty-Yuri-Min Ho dynamic in more mature ways now that everyone is older and more self-aware.

Common fan theories circulating include:

A new student or returning flame who challenges Min Ho’s place in Kitty’s life, forcing her to choose between stability and excitement.
Yuri’s unresolved feelings resurfacing during senior year stresses, creating emotional turmoil since Yuri and Kitty share deep history and genuine chemistry.
Min Ho facing temptations or family pressures in Seoul while Kitty navigates life in Portland, leading to distance that invites a third party.
Kitty herself questioning whether her “endgame” with Min Ho is truly right, especially as she grows into her independence.

Showrunner Valentina Garza and the cast (including Anna Cathcart) have teased in interviews that there’s “a lot to look forward to” and plenty of relationship milestones left to explore — from meeting families to handling real adult pressures. Cathcart has even called Kitty and Min Ho “endgame” in the moment, but emphasized the beauty of not knowing exactly what comes next.

What a Season 4 Love Triangle Could Bring

A brand-new triangle would fit perfectly with XO, Kitty’s signature blend of sweet romance, heartfelt growth, and light chaos. It could:

Push Kitty to mature beyond her matchmaking tendencies and learn to prioritize her own happiness.
Deepen the friendships within the KISS crew as they support (or meddle in) each other’s love lives.
Explore cultural and family dynamics more intensely as characters prepare for life after high school.
Deliver the kind of will-they-won’t-they tension that made the earlier seasons so addictive, while giving Min Ho and Kitty space to prove their bond is stronger than any outside interference.

Fans are particularly excited about the possibility of seeing more of Kitty’s family (including potential crossovers with Lara Jean) and Min Ho stepping fully into her world in Portland — moments that could either solidify their relationship or highlight cracks that a new love interest might exploit.

Renewal Outlook and Potential Timeline

As of early April 2026, Netflix has not officially renewed XO, Kitty for Season 4. However, the series has consistently performed well, and renewal decisions often come quickly after a new season drops. If greenlit soon (possibly in the coming weeks), Season 4 could arrive in early to mid-2027, likely following the pattern of previous releases.

Anna Cathcart and the rest of the cast have expressed genuine enthusiasm for continuing Kitty’s story, and the creative team seems eager to give fans more time with these beloved characters before their KISS chapter fully closes.

Whether Season 4 delivers the ultimate Kitty-Min Ho payoff, throws a curveball with a surprising new romance, or explores a revived triangle with Yuri or someone entirely new, one thing is clear: fans want Kitty’s journey to keep evolving with the same heart, humor, and swoon-worthy moments that made the show a hit.

What do you think — should Season 4 introduce a brand-new love interest to shake things up, or lean into the existing chemistry with Yuri or Min Ho? Are Kitty and Min Ho truly endgame, or is there still room for one more complicated triangle?

Drop your biggest theories below — and keep an eye on Netflix for any official renewal news. In the meantime, a full rewatch of Seasons 1–3 is the perfect way to fuel the speculation. 💕