From Hoshikuzuu Scans:

Kengo is depressed after injuring his arm during baseball practice. He meets an unsociable student in the music room. The next day, after realizing that the student was his classmate, Yoshioka, who has never shown up for class, he visits the music room again. Despite Yoshioka's evasiveness, Kengo's persistence leads to the discovery that Yoshioka was held back one year due to a case of bullying. This is a story that depicts a tale of love between two wounded boys.

At age 33, I am a loser, jobless and virgin, who only has remorse and pity for myself. Called by Anna, my secret crush in my childhood, and her fiance, I come to face the reality. But after I fall from the roof (caught wearing a grade school girl's swimsuit) I find myself to be back in the past. Now I will get my life back.

After an incident that left Kou Fujimara grievously injured; losing sight from both eyes, the college student undergoes surgery and miraculously survives. However, this event significantly changes Kou's life, as he gains extrasensory perception abilities. Soon, a woman appears, and the boy's life changes overnight.

This is the story of Udou's older brother, Takayuki from Gosan no Heart.

One day, at the party Takayuki attends, he meets Kiyotake - his old classmate from high school 8 years ago. Kiyotake’s girlfriend in high school was stolen by Takayuki. What will happen when the two meet? What will happen when one of them is drunk? Will Takayuki painful feelings of unrequited love come to an end or will there be a happy ending?

5. The Date of Miscalculation
Chapter The Heart of Miscalculation.

Plot revolves around high school freshman Shingo Susa as he is invited by his crush from middle school Sayuri Shiroyuki to the school's supernatural club. Over the course of the series Susa begins to gain supernatural powers, something that prodigy Rei Uryu, attempts to awaken to bring out the psychic giant, Susano Oh to destroy humanity and establish a new world order.

Won the 4th Kodansha Manga Award for Shounen in 1980.

Sekine Keiichiro is handsome, intelligent, and popular. He's a jack-of-all-trades who's loved by women. Loved, that is, until they find out he's passionless and stoic and completely lacking in conviction. In a moment of self-reflection he starts hunting: Can anything make him feel? He's about to find out.

From MangaHelpers:
This is a story of a group of college-age people who struggle with gender and sexual identity.
Yuki (nicknamed Yoshiki) is a girl, but she is terrible at 'being feminine.' She mostly dresses like a boy and is often mistaken as one. However, she has to wear a skirt and imagine being dominated by a guy in order to masturbate. Nagao Mikako seems young and innocent, and she uses that apparent innocence to sell her body as a fake 15-year-old. She knows her youthfulness can't last forever, but she enjoys tricking the men. Her friends have no idea of her sexual habits and believe her to be sweet and sheltered. Aiba Kaito is a pretty good-looking guy, but he wants to be Nagao Mikako. He often dresses as a girl, picking out clothes that mimic Mikako's style. Though he's into cross-dressing, he is still attracted to women. Will these young adults and their friends be able to handle their 'guilty secrets' and muddle their way through this confusing period of their lives?

A new transfer student has come into town, a girl with a mysterious air and black clothing who is called Inugami Sakuya. What few know is that by moonlight, she hunts and kills those possessed by "Inugami." A man can become possessed by being bitten, leading to a nighttime transformation into a beast driven to eat women. Sakuya gets no thanks for brutally ending the lives of these unfortunate men with her sword, and she is often too late to save the women they threaten. Sakuya also must deal with her own inner demons, which are all too real.