Aitsu Yori Saki ni Omae wo Dakitai: Zetsurin Futago no Ikisugi Ai

Komachi met Akitaka and Fuyutaka when all of them were little. It was then when the twins proclaimed her their servant, and her freedom has been limited ever since. This is the reason why Komachi never had a chance to make a boyfriend. Now, however, her young boss has caught her eye... about which she tells the twins when the three of them are drinking together. This triggers weird reactions in Akitaka and Fuyutaka who start kissing and caressing her, with an intention to make her lose her mind. Komachi's body reacts to their rough touch, while the two are debating which one of them will take her virginity.

(Source: Coolmic)

Note: Simultaneously released in long-strip and traditional formats, with 12 episodes and 6 chapters respectively.