Innocent Thing (2014)

Native Title: ??
Also Known As: Thorn , Ttalgiuyu , Strawberry Milk , Gasi , Gashi , ????
Screenwriter: Lee Sung Min
Director: Kim Tae Kyun
Genres: Thriller, Psychological, Romance, Melodrama
Tags: Nudity, Taboo, Student-Teacher Relationship, Sexual Content, Student Female Lead, School Setting, Married Male Lead, Teenager Female Lead, Adult-Minor Relationship, Age Gap [Drama Life]

Native Title: ??
Also Known As: Thorn , Ttalgiuyu , Strawberry Milk , Gasi , Gashi , ????
Screenwriter: Lee Sung Min
Director: Kim Tae Kyun
Genres: Thriller, Psychological, Romance, Melodrama
Tags: Nudity, Taboo, Student-Teacher Relationship, Sexual Content, Student Female Lead, School Setting, Married Male Lead, Teenager Female Lead, Adult-Minor Relationship, Age Gap [Drama Life]

Seok Won was found murdered at home. The suspect is his daughter Yoo Jin. Her mother Ja Yeong struggles to get Yoo Jin free and not guilty. The two of them live a normal everyday life but they’re both traumatized. Then one day, Ja Yeong meets Dong Ha and opens up to him.

Unstable young female characters able to go through great lengths for the one they love, if you may a sick love

Older man younger woman forbidden relationship movie with dark plot & with sexual content. Definitely don't watch with your parents around.

Eun Mo is back in her hometown, Paju after spending three years of soul searching in India. However, the reality she returns to is far from comforting as she is faced with a dreaded reunion with her widower brother-in-law, Joong Shik. Almost a decade ago when Joong Shik came to Paju as a student activist fugitive, Eun Mo never took a liking to Joong Shik who ended up marrying her older sister, Eun Soo. But she was forced to live with him when a tragic accident took her sister’s life. During a course of three years, Eun Mo gradually discovered she was carrying complex emotions toward Joong Shik. Having felt trapped, she decided to leave Paju. Eun Mo believed she had resolved all emotional conflicts in India, but as she digs further into her sister’s death, she becomes torn between the truth and her feelings for Joong Shik.

Min Ki is an unemployed banker. He now takes over the domestic roles of the house: cooking, cleaning, and watching the baby. In his free time, he watches soap operas and reads romance novels. Meanwhile, his wife Bo Ra works at an English language institute and is having an affair with a former lover. One day, Min Ki accidentally stumbles upon a key, that belongs to his wife, and is unfamiliar.

Jin awakes from a dream where he causes a traffic accident to find that the accident actually took place. The police suspect a woman, Ran, though she denies any involvement as she was asleep the whole time. It transpires that while Jin dreams, Ran acts out those dreams in her sleep.

Both movies centers around a teacher and his/hers relationship with a student. Both are very dark and has many twists.

Following a failed confession to her first love, female high school student Mikoto Ochiai contemplates jumping off the roof of the school building. However, her thoughts are interrupted by the arrival of Jin Haiba, the physics teacher known for being a slacker and the butt of students' jokes. Calmly, he lights a cigarette and asks for an explanation of the events that led her to this precipice. Rather than dissuade her from killing herself, he makes a request—will she enter into a romance with him before she dies? Together, the two gradually ponder why they should keep living and why they should not love each other in earnest.

Lok is a recovering schizophrenic who yearns for love. One day, he encounters the young and beautiful Yan and quickly falls in love with her. Just when he struggles whether to tell her about his illness, he has a relapse and becomes delusional. Little does he know that she's a psychological counselor who has a hidden agenda. The pair develops a relationship that is beyond their wildest dreams.

Its hard to really go into the similarities of the two movies without spoiling things. From the outside they might look totally different but there are a few things they have in common, i suggest you just watch both

Essentially both films are about student-teacher relationship, which is a well-worn enough trope that you'd think it impossible to writing anything fresh out of it, but Yong Soon approaches its characters and themes with a slightly optimistic purity and comes out the other side a bittersweet mess.

Both of these movies are bat shit CRAZY at times. They also include characters that are so mad in love with the main protagonist that they go to crazy lengths. Its also left to own interpretation if it was one sided or requited

Both main male leads have wives and supposedly happy lives until they start a forbidden affair with someone much younger than them. That other person falls in love HARD and doesnt mind going to great lengths..

Both connects with a Student-Teacher relationship. These movies made me speechless to the point I dont know where am I anymore. It also have similar events that was so dark yet emotional at the same time and it was just executed brilliantly.