📝 Highlights & Appeal Light spoilers
01① The story finally reaches the Hawaiianz arc
Kazuya, Chizuru, and the rest of the cast head to a resort reminiscent of the real-life Spa Resort Hawaiians.
02② Kazuya finally resolves to be serious about Chizuru
Buoyed by the success of a crowdfunding campaign, Kazuya makes up his mind to face his true feelings for Chizuru.
03③ Ruka Sarashina goes all-in
The occasionally pushy 'girlfriend (temporary)' Ruka closes in on Kazuya more aggressively than ever before.
04④ Ex-girlfriend Mami Nanami closes in on Chizuru
Kazuya's manipulative ex Mami, who knows the truth behind his relationship with Chizuru, makes a tense move toward Chizuru herself.
05⑤ OP theme by ClariS: 'Umitsuki'
Popular duo ClariS provides the OP theme 'Umitsuki,' setting the tone for Season 4's story.
06⑥ ED theme by halca: 'Kokuhaku Bungee Jump'
Halca's ED theme 'Kokuhaku Bungee Jump' lingers on the emotional aftertaste of each episode's romantic maneuvering.
07⑦ A split-cour format for a slower burn
Airing across two split cours starting July 2025, the season takes its time developing every character's shifting feelings.
08⑧ Season 5 continues the Hawaiianz arc
The confirmed Season 5 will continue as the second half of the Hawaiianz arc, airing in 2026.
💡 Key Points & Predictions Some spoilers
Season 4 concluded on September 19, 2025, with Season 5 — continuing the Hawaiianz arc — set to air in 2026. The biggest question going forward is exactly how Kazuya and Chizuru's relationship will change.
🧾 Story So Far Contains spoilers
After being dumped, Kazuya Kinoshita rents Chizuru Mizuhara through a rental girlfriend app, and their fake relationship gradually deepens across Seasons 1 through 3, pulling in his manipulative ex Mami, his junior Sumi, and the pushy rental girlfriend Ruka. In Season 4, having successfully crowdfunded a film project, Kazuya resolves to get serious about Chizuru — even as Mami and Ruka both make their own moves, all while the story heats up at a Hawaiian-style resort.
✅ Recommended Viewing Points
Recommended for fans of slow-burn romance and fast-paced rom-com — also a must for fans of theme song artists like ClariS and halca.
👀 Trivia & Fun Facts
💫 Unresolved Foreshadowing Contains spoilers
Now that Kazuya has resolved to be serious, the big question is whether he and Chizuru will finally move toward a real relationship — or whether new obstacles will get in the way.