BL - Bet On It

For a punishment game, Nagami punishment was to kiss the next person who walks by, but the stranger he kiss turns out to be Miyata, a third year senpai. When Nagami goes to the nurses office, Miyata reveals he was one Nagami had kissed. But instead of forgetting about the kiss like Nagami asks, Miyata assaults him, getting a picture of Nagami's o-face for blackmail. Now, Nagami is doing whatever he can to delete that picture.

Ch. 1-4: Chitose seduces men just to turn them down and his gentle customer Narita's his next target. However, Narita, who has been purposely acting while knowing about Chitose's hobby, gets Chitose alone and makes a bet with him: if they don't have sex by the end of the month, Narita will leave Chitose alone.

Ch. 1-3: As college student Hiroki's penalty for losing at mahjong, he's forced to go to the convenience store wearing a school girl's uniform. When Hiroki is harassed by a drunk old man on the way there, he is saved by scary-looking high school teacher Kuga, who also initially mistakes Hiroki for a girl. After Hiroki runs into Kuga again, dressed normally this time, Hiroki realizes he's become interested in Kuga.

Pg. 8-30, 168-175: Nagi and Natsuki, two equally popular college student, become good friends after a prank Natsuki pulled. But, Natsuki feels awkward and starts ignoring Nagi after they sleep together.

Ch. 1: After losing a bet, Tsukasa must become his senpai Hijiri's personal toy for 3 days

Ch. 1: After losing a bet with his friends, high schooler Mitsuya's penalty is to stand at a known gay pick-up spot for an hour. While there he's approached by salaryman Saitou and, when Mitsuya's interest outweighs his survival insticts, Mitsuya follows him to a hotel. After their encounter, Mitusya wants to see Saitou again.

Ch. 5: If you follow King's account and execute his orders, you'll find happiness, but if you don't obey you'll get cursed. Wakaba's order is "have sex with a guy," so his friend Kujo has to help him.

Ch. 3: Ginji and Miki are childhood friends and rivals working at the same apparel shop. After making a bet on sales where the loser does whatever the winner says, the winner, Miki, kisses Ginji telling him to think about what the kiss meant

Secret XXX Spin-Off
After getting dumped by his girlfriend, Shizuma, Shohei's older brother, drunkenly has a one night stand with Minato, Mito's younger brother, after comforting him over being upset at Shohei stealing Mito. Minato, thinking he had finally found someone he wanted to stay with, becomes furious when Shizuma wakes up without any memories of their night together. So, Minato decides to get revenge by seducing Shizuma into falling in love with him, then abandoning him.

Ch. 2: When he was in high school, Daisuke used to play the king's game with his elementary school neighbor Kaname, but eventually stopped. Now, Kaname is in high school and he wants to try playing again