I'm Going To Be Stolen By My Gloomy Shut-In Little Sister With Enormous Boobs ~I Wouldn't Make My Big Brother Feel Lonely~

Touya, finally musters the courage and confesses to his childhood friend, Ichika. Ichika, a popular idol also loves him back, and after affirming their mutual love, the two of them start dating. - One day, a TV news report shows Ichika together with a handsome actor, "Touya is the only one I love" Ichika reassures Touya, however Touya can't help but feel uneasy. - Yomogi, Touya's little sister, cannot bear to see her beloved older brother so distressed, so she makes up her mind, "I will steal Onii-chan from Ichika" - A story of netori, sibling netori.​