Kawaikereba Hentai demo Suki ni Natte Kuremasu ka?

One afternoon, while tidying up the Calligraphy Club room, Kiryuu Keiki stumbled upon a mysterious love letter addressed to him. Excited by the prospect of finally finding romance, he eagerly tore open the envelope—only to discover a simple confession, “I like you,” accompanied by a pair of the sender’s underwear. With nothing but the panties as a clue, Keiki realized the culprit had to be one of the four girls who had helped him clean earlier: Tokihara Sayuki, the laid-back club president; Koga Yuika, the half-foreign library committee member; Nanjou Mao, his slightly tsundere classmate; or, most awkwardly, his own younger sister, Kiryuu Mizuha, who was obsessed with cleanliness. Convinced that at least three of them could be the mysterious admirer, Keiki resolved to uncover the truth, determined to find out which of these unconventional girls would end up as his sweetheart. The hunt for the panty-dropping confessor had begun, and Keiki was ready for whatever surprises lay ahead.

His investigation would require careful observation, subtle questioning, and perhaps a bit of luck. Each girl had her quirks, making the mystery even more perplexing. Would it be the carefree club president, the bookish foreigner, the tsundere classmate, or—most shockingly—his own sister? As Keiki navigated this bizarre yet thrilling situation, he couldn’t help but wonder what kind of relationship awaited him once the truth came to light. The journey promised laughter, confusion, and maybe even love—if he could just figure out who left those panties behind.