"NG Life" is a manga series that blends elements of comedy, romance, and historical fantasy. The story centers around Keidai Saeki, a high school student who vividly remembers his past life as a Roman soldier named Sergius, living in the ancient city of Pompeii. These memories are not mere fantasies; they are detailed and emotionally charged, often intruding into his present-day life. Keidai struggles to reconcile his past identity with his current reality, especially as he encounters people from his past life who have been reincarnated into his modern world.

In his past life, Sergius was deeply in love with his childhood friend, Loleus, and shared a close bond with his fellow soldier, Marius. In the present day, Keidai discovers that his childhood friend, Mii Serizawa, is the reincarnation of Loleus, while his classmate, Yagyu, is the reincarnation of Marius. However, the reincarnations do not retain their memories of Pompeii, leading to a complex dynamic. Keidai is torn between his lingering feelings for Loleus and his growing affection for Mii, who is now a different person despite her shared soul. Meanwhile, Yagyu, unaware of their shared history, becomes a rival for Mii’s affections, adding tension to their relationships.

The narrative explores themes of identity, love, and the persistence of memory across lifetimes. Keidai’s attempts to navigate his dual existence often result in humorous misunderstandings, particularly as his past-life instincts clash with modern social norms. The story also delves into the lives of other reincarnated characters from Pompeii, revealing how their past experiences influence their present-day personalities and relationships. As the series progresses, Keidai gradually learns to accept the separation between his past and present selves, striving to build meaningful connections in his current life while honoring the memories of his former one.

The manga balances lighthearted comedy with moments of emotional depth, particularly in its exploration of unresolved feelings and the impact of past traumas. The historical backdrop of Pompeii adds a layer of tragedy, as the characters’ past lives were cut short by the eruption of Mount Vesuvius. This historical context underscores the themes of loss and renewal, as the characters seek to move forward while carrying the weight of their past. Through its unique premise and character-driven storytelling, "NG Life" offers a compelling exploration of love and identity across time.