It is a lid and it's Misaku-san X Misaku Musei X-shaped thing and it is a good thing and it's like Dako S-Squirrel 3D

FUTA TO ARU MAJUTSU NO INDEX SHIRAI KUROKO X MISAKA MISUZU (3D HENTAI)

FUTA TO ARU MAJUTSU NO INDEX MISAKA MISUZU X SSSS.GRIDMAN RIKKA'S MOTHER 3D HENTAI

BAKEMONOGATARI TOOE GAEN MAID COSTUME 3D HENTAI

FUTA TO ARU MAJUTSU NO INDEX SHIRAI KUROKO X MISAKA MIKOTO 3D HENTAI

FUTA TO ARU MAJUTSU NO INDEX MISAKA MIKOTO X Saten Ruiko (3D HENTAI)

FUTA to Aru Majutsu no Index Misaka Mikoto X Seiri Fukiyose (3D HENTAI)

FUTA TO ARU MAJUTSU NO INDEX MISAKA MIKOTO X UIHARU KAZARI (3D HENTAI)

(3D Hentai)(Futa)(Toaru Majutsu no Index) Frenda x Misaka

(3D Hentai)(Futa)(Toaru Majutsu no Index) Frenda x Misaka

FUTA BAKEMONOGATARI SURUGA KANBARU X TOOE GAEN (3D HENTAI)

FUTA MONOGATARI BLACK HANEKAWA X BAKEMONOGATARI TOOE GAEN 3D HENTAI

TO ARU MAJUTSU NO INDEX FUKIYOSE SEIRI AND KONORI MII MAID COSTUME 3D HENTAI

FUTA TO ARU MAJUTSU NO INDEX MISAKA MIKOTO X FUKIYOSE SEIRI AND KONORI MII 3D HENT

FUTA TO ARU MAJUTSU NO INDEX MANAGEMENT X KEKKAI SENSEN CHAIN SUMERAGI (3D HENTAI)

BAKEMONOGATARI IZUKO GAEN AND TOOE GAEN (3D HENTAI)