I Don't Know Which One is Love 4-5 Melonbooks Bonus Leaflet Valentine's Fair Illustration Card Simultaneous Purchase Bonus Bath Poster Included Instant purchase ○ MFC Qun Series I Don't Know Which One is Love New and Backlist Purchase Campaign KADOKAWA's Yuri Expo 2025 in Melonbooks (MFC Qun Series) KADOKAWA's Yuri Expo 2025 in Melonbooks Okutamamushi I Don't Know Which One is Love Dorekoi (Short for "Dore ga Koi ka Wakaranai")