Lock On! is a shonen manga by Kenta Tsuchida. It's 18 chapters long plus the original one-shot.
The story follows Kurihara Niko, who Does Not Like Men
, as she becomes friends with Sanada Utsuru, a Chivalrous Pervert
who is a professional photographer at the age of 17. After transferring into Niko's class, Sanada decides to start a photography club with Niko's friend, Yuki
. Sanada also has a special power called "Shutter Eye," which he can use to remember everything he sees perfectly.
Lock On! provides examples of: