[ENG Ver.] When I Used A Lust Inducing App On A Cocky Boyish Girl… (Manga Ver.)

Editorial Review

★3.5 / 5 — henhenta editorial rating (our own assessment, not the DLsite official user score)

The “magic app” premise is a staple of adult doujinshi, and this one pairs it with the estranged-sibling-figure setup that has become a reliable subgenre of its own. In a landscape crowded with supernatural-device stories, the appeal usually comes down to how well the dynamic between the two leads is sketched in a short page count.

What distinguishes this release is the emotional hook behind the gimmick. The narrator isn’t chasing a faceless conquest. He wants the old Kou Azuma back, the girl who called him “Oniichan” before she turned hostile and started avoiding him. That gives the app a petty, relationship-driven motive instead of pure opportunism. The tag-adjacent “cocky, boyish” characterization sets up a clear contrast between her abrasive exterior and the helpless reaction the app forces on her, and that tension is the engine of the story. The narrator’s miscalculation, expecting mild fidgeting and getting something far stronger, gives the 31 pages a simple escalation arc. It is delivered in monochrome manga format, so the focus falls on linework and paneling rather than color rendering. A separate CG version exists for readers who prefer that presentation, and this English-language JPEG edition suits anyone who wants the manga format specifically.

Be aware that the premise rests on a non-consensual setup, with the app imposed on her without her knowledge. That is a defining element, not a side detail, and readers who dislike it should skip this one.

Best suited to readers who enjoy short, premise-driven stories with a tsundere-adjacent contrast and a love of the “unintended consequences” trope.

Verdict: A compact, formula-faithful gimmick story that works best for fans of hostile-to-helpless dynamics who don’t mind a dubious-consent starting point.