An information processing system, a server, a user terminal, an information processing method, and a program capable of effectively realizing psychological exchanges among users is provided. A user terminal 110 includes a terminal-side display control unit 113 that generates a first flower image corresponding to a first user, a display unit 111 that displays an image generated by the terminal-side display control unit 113, and an input unit 112 that receives a first input operation by the first user. The terminal-side display control unit 113 changes the first flower image according to the first input operation.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A user terminal comprising: a terminal-side display control unit that generates a first flower image corresponding to a first user; a display unit that displays an image generated by the terminal-side display control unit; and an input unit that receives a first input operation by the first user, wherein the terminal-side display control unit changes the first flower image according to the first input operation. 2. The user terminal according to claim 1, wherein the terminal-side display control unit generates the first flower image by a combination of a basic shape corresponding to first data and a shape state corresponding to a first parameter. 3. The user terminal according to claim 2, wherein the terminal-side display control unit: changes the first parameter according to the first input operation, and generates the first flower image according to the first parameter. 4. An information processing system comprising: a user terminal according to claim 2; and a server, wherein the server comprises a server-side display control unit capable of communicating with the terminal-side display control unit, and at least one of the terminal-side display control unit and the server-side display control unit holds at least one of first data corresponding to the basic shape and a first parameter corresponding to the shape state. 5. An information processing system comprising: a user terminal according to claim 3; and a server, wherein the server comprises a server-side display control unit capable of communicating with the terminal-side display control unit, and at least one of the terminal-side display control unit and the server-side display control unit holds at least one of first data corresponding to the basic shape and a first parameter corresponding to the shape state. 6. An information processing system comprising: a user terminal comprising: a terminal-side display control unit that generates an image; a display unit that displays the image; and an input unit that receives an input operation by a first user; and a server comprising a server-side display control unit capable of communicating with the terminal-side display control unit, wherein the server-side display control unit holds second data corresponding to a basic shape of a second flower corresponding to a second user and a second parameter corresponding to a shape state of the second flower, and the terminal-side display control unit generates an image of the second flower according to the second data and the second parameter. 7. The information processing system according to claim 6, wherein the input unit receives a second input operation by a first user, the terminal-side display control unit performs a predetermined visual expression on the second flower image according to the second input operation. 8. The information processing system according to claim 7, further comprising a second user terminal comprising: a second terminal-side display control unit; a second display unit that displays the image; and a second input unit that receives an input operation by a second user, wherein the server-side display control unit notifies the second terminal-side display control unit of an occurrence of the second input operation, and upon receiving the notification, the second terminal-side display control unit makes the second display unit display information that the second input operation has occurred. 9. An information processing method comprising: a generation step of generating a first flower image corresponding to a first user; an input step of receiving a first input operation by the first user; and a change step of changing the first flower image according to the first input operation. 10. An information processing method comprising: a step of holding, by a server-side display control unit, second data corresponding to a basic shape of a second flower corresponding to a second user and a second parameter corresponding to a shape state of the second flower, and a step of generating, by a terminal-side display control unit, an image of the second flower according to the second data and the second parameter. 11. A program for causing a computer to execute a method according to claim 9. 12. A program for causing a computer to execute a method according to claim 10.