Hajipuru! is a manga by Takuji (II). I saw the categories tags for this on mangaupdates, which were Paizuri, Public Sex, School Intercourse, and Tentacles, and lots and lots of ENF (embarrassed nude female), and just had to see it.
Junpei Manaka stumbles upon a mysterious beauty wearing strawberry print panties. With that vision forever burned into his memory, Junpei embarks on a quest to find the girl, and the panties, of his dreams!