A respected teacher’s life unravels after a brutal assault and a public humiliation. Now, he must choose between silence and revenge.

Six girls participate in the boot camp for assassins. The instructor of the boot camp is the legendary hitman, Kunioka. At first, they repel each other, but the girls gradually develop friendships while enduring the hard training. By chance, the girls get involved in a life-threatening battle with a group of anarchist hitmen.

The story centers on the daily life of college dorm roommates Yumi Irisu and Ruka Kujirai. Ruka, the older of the two, is constantly penniless despite her being active in a band. Irusu works part-time at a second-hand bookstore.

In 2018, director Sakamoto was working on a script for his new movie "Baby Assassins." He learns of a hitman business network called "Kansai Hitman Association" and applies for interviews as a reference for writing scripts. He is introduced to Masayuki Kunioka, a freelancer who is known as the strongest hitman in Kyoto. Sakamoto decides to follow Kunioka in his day-to-day life. One day, Kunioka kills the wrong person due to miscommunication with the client and is targeted by both the hitmen sent from the furious client and those who are aiming for revenge on behalf of the victim.

Ordinary college students dropped by a strange village on the way to their camp. Persuaded by a seemingly friendly villager to stay over, but brutal killings start to occur in the following morning.

ラブホテル、それは“究極の密室”─。
他のロケーションでは到底考えられない、高い密室性・秘匿性─。そんなラブホテルというワンシチュエーションで起きる、ちょっと大人なコメディドラマシリーズがなんと9年ぶりにＷＯＷＯＷで復活！
2014年、WOWOWで放送された「大人番組リーグ２」から誕生したオムニバスドラマ「ああ、ラブホテル」。笑いあり涙ありのワンシチュエーションコメディを全6話で放送し、幅広い支持を獲得。その人気シリーズが満を持して「～秘密～」と題し、パワーアップして帰ってくる！