Were there only four male protagonists in the early stage of Love of Light and Night?

No. There are five.

The male protagonist is a character who can be dated by the female protagonist. He has independent storylines and dating plots. He also has his own card "Lingxi". By unlocking and upgrading the card surface, you can obtain text messages, phone calls, dates and other related content.

1. Name: Xiao Yi (CV: Ajie/Ishikawa Keito)

English name: Osborn

Occupation: Racing driver

Height: 185cm

Age: 23 years old

Constellation: Sagittarius

Talent: Dark Blue Flame

Character Quotes: You are the black and white flag at the end of my track. Even if you are far away from the end of the world, I can see it at a glance.

2. Name: Lu Chen (CV: Adan Rover/Morikawa Tomoyuki)

English name: Evan

Occupation: CEO of Wanzhen Group

Birthday: January 22

Height: 186cm

Age: 26 years old

Constellation: Aquarius

Talent: Eyes of Illusion

Character Quotes: Let go of all those involuntary timidities and hesitations in front of me.

3. Name: Qi Sili (CV: Zhao Lu/Kishio Daisuke)

English name: Sariel

Occupation: Top designer

Birthday: September 1st

Height: 181cm

Age: Unknown

Constellation: Virgo

Talent: Extraordinary Rebirth

Character Quotes: Why is it that every time I'm with you, my rhythm is involuntarily disrupted? It's really troublesome.

4. Name: Xia Mingxing (CV: Tani Jiangshan/Kimura Ryohei)

English name: Jesse

Occupation: Musical actor

Birthday: May 26

Height: 179cm→180.2 (after bone setting)

Age: 21 years old

Constellation: Gemini

Talent: Psychic

Character Quotes: I really want to go back to that summer, no longer be timid, and use the better me now to hold your hand.

5. Name: Charlie Su (CV: Wu Lei/Yoshima Hosaya)

English name: Charlie

Occupation: Burns and Plastic Surgery Surgeon

Birthday: July 24

Height: 187cm

Age: 28 years old

Constellation: Leo

Talent: Vacuum

Character Quotes: I’ve been waiting for you for a long time, fiancée.