My Love Story!! (2015)

Gouda Takeo is a freshman in high school. (Both estimates) Weight: 120kg, Height: 2 meters. He spends his days peacefully with his super-popular-with-girls, yet insensitive childhood friend, Sunakawa. One morning, on the train to school, Takeo saves a girl, Yamato, from being molested by a pervert. Could this be the beginning of spring for Takeo?

I recommend this both drama because , Male lead and Female lead
try to solve problem
In one drama explosion and another student murder/suicide

Eripiyo is initially a woman leading a normal life until it is turned upside down after watching a performance of the minor idol group ChamJam, which leads her to becoming obsessed with one of its members, Maina Ichii. Despite Eripiyo's enthusiasm towards her, Maina is consistently the least popular member of the group, leaving Eripiyo to take it upon herself to buy a lot of Maina's merchandise, which mainly involves singles.

Due to her using almost all of her money to buy this merchandise, Eripiyo has only a single tracksuit she wears all the time. She frequently goes to ChamJam's concerts with her friends and fellow ChamJam fans: Kumasa, whose favorite is Reo Igarashi, and Motoi, who prefers Sorane Matsuyama. Eripiyo continues to work several part-time jobs to support Maina, and Maina herself increasingly becomes concerned that Eripiyo is pushing herself too hard for her.

Genres: Comedy, Romance, Youth
Tags: Rival Groups, Strong Female Lead, Yakuza, High School, Love/Hate Relationship, Adapted From A Manga, Rivals To Lovers, Sassy Female Lead, Nice Male Lead, First Love

Both are about good guys that save a girl from an attacker, and then the quest for love begins! You want to root for both Train Man and Takeo.