Ryosuke Kaga is a 17-year-old boy in his second year at Momozono Academy, class 2-B. People often call him "Erosuke" because of his strong passion for anything erotic. Even so, Ryosuke is kind and always wants to protect girls. He hides his involvement with the school’s "Eight Strange Students" from his childhood friend Mina Okura. His life changes when Lisara Restall makes a contract with him, telling Ryosuke that he will die in three months unless he helps her find a special person who can change his fate. Ryosuke can supply Lisara with energy by becoming excited, but this drains his own strength. At first, he depends on Lisara in battles, but later finds the courage and creates his own unique move called the "Invisible Dictionary." Ryosuke learns about fear, friendship, responsibility, and what it means to be truly brave.
Ryosuke is a high school boy, 17 years old and in his second year. There are no details about his exact height, weight, or other physical features provided.
Ryosuke is known for his great interest in anything erotic, which gives him the nickname "Erosuke."
Despite this, he is very gentle and wants to protect the girls around him.
He often blurts out what he is really thinking without meaning to.
He is also a big fan of Iria Fukumune.
Ryosuke is named after his father, who disappeared before Ryosuke was born.
His mother works in Germany, living far away from him.
He goes to Momozono Academy, class 2-B.
Ryosuke has a special power: when he gets excited, he recovers energy faster and can supply a large amount of energy to Lisara Restall.
After being contracted, Ryosuke can power up Lisara, but this makes him tired.
He only reaches this high level of excitement with Lisara, not with other girls.
Later, Ryosuke creates a special move called the "Invisible Dictionary."
He grows stronger and starts fighting by himself, not just depending on Lisara.
Ryosuke has a close connection to Lisara Restall after making a contract with her.
He hides his link to the "Eight Strange Students" from Mina Okura.
He also cares about Quele Zeria, becoming especially supportive after a tough fight.
Contract with Lisara
Lisara Restall tells Ryosuke that he is going to die in three months.
To keep living, he must help Lisara find a special person who can change his destiny.
Ryosuke agrees to a temporary contract with Lisara, supplying her with energy by getting excited.
Energy Power
Ryosuke’s energy gets stronger when he gets excited.
He gives Lisara lots of energy, but this sometimes leaves him exhausted.
Other girls can make him excited, but only Lisara can receive the energy.
Learning True Courage
At first, Ryosuke is overconfident after his sword "Gram" awakens.
During an early fight, he puts Quele Zeria in danger because he trusts his own power too much.
He faces a creature with no emotions and loses his fighting spirit after feeling real fear.
With Quele's help and her own brave actions, Ryosuke learns what it really means to be strong.
At first, he depends on Lisara for all battles until his sword fully awakens.
Ryosuke is known for speaking his mind without thinking.
He is a big fan of Iria Fukumune.
His parents are separated: his mom works in Germany, and his dad disappeared before Ryosuke was born.
Ryosuke is one of the main characters in "So, I Can't Play H."
He’s a member of the Eight Strange Students at his school because he is seen as the most erotic student.
He invents the special move called the "Invisible Dictionary" and grows from a cheerful, careless boy into a brave young man.
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