Seat system for airplane

A seat system for an airplane, comprising:

• a first seat unit provided at a first bottom portion of an airplane body and having a plurality of first seat bodies such that the plurality of the first seat bodies forms a first corridor;
• a second seat unit provided at a second bottom portion disposed above the first bottom portion and having a plurality of second seat bodies;
• and
• a fourth seat unit provided at a third bottom portion disposed above the second bottom portion and disposed to be spaced apart from the second seat unit,
• wherein the fourth seat unit includes a second accommodation body formed to upwardly extend from both of the third bottom portion and a second body bottom portion and a fourth seat body provided inside the second accommodation body and provided as the seat of the user,
• wherein the second seat unit further includes the plurality of second seat bodies at the third bottom portion,
• wherein the seat system further includes a first step connecting the first bottom portion and the second bottom portion, and a second step connecting the second bottom portion and the third bottom portion,
• wherein the fourth seat body includes a fourth back support body, a fourth hip support body, and a fourth leg support body,
• wherein the fourth back support body is positioned above the second body bottom portion, the fourth hip support body is positioned on the second body bottom portion, and the fourth leg support body is positioned below the second body bottom portion and above the third bottom portion,
• wherein the second body bottom portion is positioned above the third bottom portion,
• wherein the fourth seat body is oriented perpendicular to the first corridor such that the second body bottom portion is positioned directly above the first corridor and parallel to the first corridor to ensure that a height of the first corridor is sufficient to allow a person to walk in a standing position.