色欲無双～変態スキルが暴走してヤリサーから追放された俺は、はからずも淫靡な力で最強になる～

Rick, a member of the "Yarisa" (Spear Club), an adventurer group for spear users, awakens to a perverse skill called "Lust," which increases his combat abilities when he engages in erotic activities. As a result of becoming the only one who becomes incredibly popular, the club is on the verge of collapse, and Rick is expelled by the leader! Rick's solo adventure life begins...!? (Source: Kodansha, translated)