If you're looking for manga similar to Highschool Lunch Dad, you might like these titles.
“Who am I?” The legend of the French Foreign Legion, Kang Chan! During the African war, he was called ‘God of Blackfield’ by his enemies who were left in awe of him. However, during a mission to kill Masallan, the brain behind Sunni terrorist group SISS, Chan was killed in action by a bullet to the back. As his vision got blurry, he saw his thirteen team members, who had absolute faith in him, getting killed one after another. As he lost consciousness, he was saved by a mysterious power and woke up 3 years later in South Korea. However, he was in the body of another ‘Kang Chan’, a 19-year-old high school boy who was being bullied at school. Kang Chan’s journey to get revenge on the traitor, and to find out the truth behind his rebirth, begins now!
Breathing does not guarantee everyone’s alive! Dan Sa Yu, a descendant of Goryeo, greatly reprimands the Central District for the sake of his friend whom he treasures the most. He reigns every battle! No one could stop him! Cheonpo Armed Forces. The greatest martial arts of Goryeo! The legend of Cheonpo Armed Forces lives on while the history of the King of War unfolds!
The world is in constant turmoil, with constant wars breaking out between Heroes and Villains. Gifted with supernatural abilities, one lone girl sets out on a bloody path for revenge against the injustices of the world she lives in. With the constant clashes between titans, no one is safe. If no one is willing to protect the innocent, who are the real heroes, and who are the real villains? What truly separates one from the other?
The seagulls that suddenly hit a village one day. The protagonist, Han-cheon, who fled the village to find a way to live after losing his mother to a seagull. It is learned that the mother was not actually killed by the haegui, but was kidnapped for food. Han-cheon goes on a dangerous journey to save his mother...