Tsugou no Yoi Sexfriend - Season 1

Arahama Yuu maintains casual sexual relationships with five different women. His arrangement faces a crisis when one partner, his coworker Shimizu Misako, reveals she believed their intimacy would lead to marriage. Learning he viewed her only as a sex-friend and that four others exist, she becomes enraged. She forces him to assemble all five women at his apartment. There, Shimizu meets the others: Yanagi Ryouko, a cafe owner from his neighborhood; Hoshino Kotori, a schoolgirl he knows; Endou Makiko, a corporate executive; and Kamishima Aina, a woman he met through an online dating site. Confronted with this group, Shimizu demands Arahama end his casual lifestyle and commit to a single partner. The ensuing argument grows chaotic, culminating in Arahama impulsively proposing marriage to all five women. Afterward, Arahama attempts to retract his proposal. The story follows his subsequent individual visits to each woman as he tries to undo his hasty promise.