Lock On! is a shonen manga by Kenta Tsuchida. It's 18 chapters long; has an original one-shot; and serialized in Weekly Shonen Jump
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:
- All Men Are Perverts: Zig-zagged: Most of the guys who show up for a chapter or two end up sexually harassing someone, while Sanada is a Chivalrous Pervert, Yamato is only interested in Yuki, and everyone else is fine.
- Berserk Button: Yamato is very protective of Yuki. Sanada doesn't like to see someone make a girl cry. When he ends up doing it himself, he jumps out a window...
- Blessed with Suck: The day after Sanada uses his eye too much, he goes crazy.
- Chivalrous Pervert: Sanada
- The Ditz: Yuki
- Does Not Like Men: Niko (This is changing)
- Eyepatch of Power: Sanada uses one to cover his Shutter Eye.
- Face of a Thug:
- Yamato and his father.
- Niko also cultivates one intentionally, in order to keep men from hitting on her.
- The Fighting Narcissist: Ryuichi Kamiyama is a former boxer who stopped because he reeked of sweat and now works as a model.
- Genki Girl: Matsuri whenever she takes off her glasses.
- Hand Wave: In-universe: Sanada's explanation for all of his abilities is: "I'm a photographer."
- Jerk with a Heart of Gold: Yamato and Ueno
- Living Lie Detector: Deconstructed with Sanada. His master tells him that his eye prevents him from understanding love.
- Love Epiphany: Niko's last line: "...because even I was able to fall in love with you."
- Love Triangle: Niko/Sanada/Matsuri
- Magical Eye: Sanada's Shutter Eye is darker than his other one. He uses it to remember anything he sees perfectly and instantly.
- Meganekko: Matsuri
- Older Than They Look: Machiko
- Psychic Nosebleed: Sanada gets it when he uses his Shutter Eye. And whenever he takes pictures of girls.
- Shipper on Deck: Invoked: When Sanada decides he needs to take more pictures of guys, he tries to get Yamato and Yuki together so he'll enjoy getting a picture of Yamato.
- Shrinking Violet: Matsuri
- Teacher/Student Romance: One of Ueno's students has a crush on him. But then he tells her he's not interested. It turns out he was lying, and he decides to wait until she graduates to do anything with her.
- Tsundere: Niko and Yamato
- Vitriolic Best Buds: Sanada and Yamato
- What Is This Thing You Call "Love"?: Sanada