Ressha Sentai ToQger x Kamen Rider Gaim x Happiness Charge Pretty Cure! x Aikatsu!: Summer Vacation Combining Special (烈車戦隊トッキュウジャーx仮面ライダー鎧武（ガイム）xハピネスチャージプリキュア!xアイカツ!: 夏休み合体スペシャル,Ressha Sentai Tokkyūjā x Kamen Raidā Gaimu x HapinesuChāji PuriKyua! x Aikatsu!: Natsuyasumi Gattai Supesharu?) is an upcoming live-action/animated crossover between Ressha Sentai ToQger, Kamen Rider Gaim, Happiness Charge Pretty Cure! and Aikatsu!.
The ToQgers stop at a train station near a big city with a city is Kamen Rider Gaim World, Happiness Charge Pretty Cure! World and Aikatsu! World whose citizens are friendly all the time and no Shadow Line activity seems to take place. However, while exploring this city and getting ready to dine on the local food, a threat emerges in the form of a strange monster.